Home / 11,688.40-16,113.21-7,209.13

Finding the Fourth Proportional to 11,688.40, 16,113.21 and 7,209.13

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Solution

The fourth proportional to 11,688.40, 16,113.21 and 7,209.13 is: 9,938.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,688.40 : 16,113.21 = 7,209.13 : x
  2. Step 2: Convert to fraction form
    11,688.40/16,113.21 = 7,209.13/x
  3. Step 3: Cross multiply
    11,688.40x = 16,113.21 × 7,209.13
  4. Step 4: Simplify right side
    11,688.40x = 116,162,225.61
  5. Step 5: Solve for x
    x = 116,162,225.61/11,688.40
  6. Step 6: Final answer
    x = 9,938.25

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Half scale
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Double scale
Find fourth proportional to 11,689.40, 16,114.59 and 7,210.13
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.