Home / 15,813.40-21,822.18-8,740.12

Finding the Fourth Proportional to 15,813.40, 21,822.18 and 8,740.12

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Solution

The fourth proportional to 15,813.40, 21,822.18 and 8,740.12 is: 12,061.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,813.40 : 21,822.18 = 8,740.12 : x
  2. Step 2: Convert to fraction form
    15,813.40/21,822.18 = 8,740.12/x
  3. Step 3: Cross multiply
    15,813.40x = 21,822.18 × 8,740.12
  4. Step 4: Simplify right side
    15,813.40x = 190,728,471.86
  5. Step 5: Solve for x
    x = 190,728,471.86/15,813.40
  6. Step 6: Final answer
    x = 12,061.19

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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.