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Finding the Fourth Proportional to 28,605.24, 42,937.02 and 19,721.16

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Solution

The fourth proportional to 28,605.24, 42,937.02 and 19,721.16 is: 29,601.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,605.24 : 42,937.02 = 19,721.16 : x
  2. Step 2: Convert to fraction form
    28,605.24/42,937.02 = 19,721.16/x
  3. Step 3: Cross multiply
    28,605.24x = 42,937.02 × 19,721.16
  4. Step 4: Simplify right side
    28,605.24x = 846,767,841.34
  5. Step 5: Solve for x
    x = 846,767,841.34/28,605.24
  6. Step 6: Final answer
    x = 29,601.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.