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Finding the Fourth Proportional to 18,707.17, 28,061.96 and 7,607.80

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Solution

The fourth proportional to 18,707.17, 28,061.96 and 7,607.80 is: 11,412.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,707.17 : 28,061.96 = 7,607.80 : x
  2. Step 2: Convert to fraction form
    18,707.17/28,061.96 = 7,607.80/x
  3. Step 3: Cross multiply
    18,707.17x = 28,061.96 × 7,607.80
  4. Step 4: Simplify right side
    18,707.17x = 213,489,779.29
  5. Step 5: Solve for x
    x = 213,489,779.29/18,707.17
  6. Step 6: Final answer
    x = 11,412.19

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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.