Home / 13,120.91-18,106.19-7,151.99

Finding the Fourth Proportional to 13,120.91, 18,106.19 and 7,151.99

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Solution

The fourth proportional to 13,120.91, 18,106.19 and 7,151.99 is: 9,869.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.91 : 18,106.19 = 7,151.99 : x
  2. Step 2: Convert to fraction form
    13,120.91/18,106.19 = 7,151.99/x
  3. Step 3: Cross multiply
    13,120.91x = 18,106.19 × 7,151.99
  4. Step 4: Simplify right side
    13,120.91x = 129,495,254.06
  5. Step 5: Solve for x
    x = 129,495,254.06/13,120.91
  6. Step 6: Final answer
    x = 9,869.38

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Half scale
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Double scale
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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.