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Finding the Fourth Proportional to 29,220.16, 40,323.68 and 15,972.16

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Solution

The fourth proportional to 29,220.16, 40,323.68 and 15,972.16 is: 22,041.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,220.16 : 40,323.68 = 15,972.16 : x
  2. Step 2: Convert to fraction form
    29,220.16/40,323.68 = 15,972.16/x
  3. Step 3: Cross multiply
    29,220.16x = 40,323.68 × 15,972.16
  4. Step 4: Simplify right side
    29,220.16x = 644,056,268.75
  5. Step 5: Solve for x
    x = 644,056,268.75/29,220.16
  6. Step 6: Final answer
    x = 22,041.50

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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.