Home / 15,699.04-21,605.52-13,175.20

Finding the Fourth Proportional to 15,699.04, 21,605.52 and 13,175.20

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Solution

The fourth proportional to 15,699.04, 21,605.52 and 13,175.20 is: 18,132.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.04 : 21,605.52 = 13,175.20 : x
  2. Step 2: Convert to fraction form
    15,699.04/21,605.52 = 13,175.20/x
  3. Step 3: Cross multiply
    15,699.04x = 21,605.52 × 13,175.20
  4. Step 4: Simplify right side
    15,699.04x = 284,657,047.10
  5. Step 5: Solve for x
    x = 284,657,047.10/15,699.04
  6. Step 6: Final answer
    x = 18,132.13

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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.