Home / 21,399.84-29,527.02-13,439.16

Finding the Fourth Proportional to 21,399.84, 29,527.02 and 13,439.16

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Solution

The fourth proportional to 21,399.84, 29,527.02 and 13,439.16 is: 18,543.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.84 : 29,527.02 = 13,439.16 : x
  2. Step 2: Convert to fraction form
    21,399.84/29,527.02 = 13,439.16/x
  3. Step 3: Cross multiply
    21,399.84x = 29,527.02 × 13,439.16
  4. Step 4: Simplify right side
    21,399.84x = 396,818,346.10
  5. Step 5: Solve for x
    x = 396,818,346.10/21,399.84
  6. Step 6: Final answer
    x = 18,543.05

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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.