Home / 15,720.84-21,701.25-9,432

Finding the Fourth Proportional to 15,720.84, 21,701.25 and 9,432

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Solution

The fourth proportional to 15,720.84, 21,701.25 and 9,432 is: 13,020.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,720.84 : 21,701.25 = 9,432 : x
  2. Step 2: Convert to fraction form
    15,720.84/21,701.25 = 9,432/x
  3. Step 3: Cross multiply
    15,720.84x = 21,701.25 × 9,432
  4. Step 4: Simplify right side
    15,720.84x = 204,686,190
  5. Step 5: Solve for x
    x = 204,686,190/15,720.84
  6. Step 6: Final answer
    x = 13,020.05

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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.