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Finding the Fourth Proportional to 28,699.53, 39,605.31 and 15,952.31

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Solution

The fourth proportional to 28,699.53, 39,605.31 and 15,952.31 is: 22,014.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699.53 : 39,605.31 = 15,952.31 : x
  2. Step 2: Convert to fraction form
    28,699.53/39,605.31 = 15,952.31/x
  3. Step 3: Cross multiply
    28,699.53x = 39,605.31 × 15,952.31
  4. Step 4: Simplify right side
    28,699.53x = 631,795,984.74
  5. Step 5: Solve for x
    x = 631,795,984.74/28,699.53
  6. Step 6: Final answer
    x = 22,014.16

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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.