Home / 12,487.98-18,719-5,909.16

Finding the Fourth Proportional to 12,487.98, 18,719 and 5,909.16

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Solution

The fourth proportional to 12,487.98, 18,719 and 5,909.16 is: 8,857.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,487.98 : 18,719 = 5,909.16 : x
  2. Step 2: Convert to fraction form
    12,487.98/18,719 = 5,909.16/x
  3. Step 3: Cross multiply
    12,487.98x = 18,719 × 5,909.16
  4. Step 4: Simplify right side
    12,487.98x = 110,613,566.04
  5. Step 5: Solve for x
    x = 110,613,566.04/12,487.98
  6. Step 6: Final answer
    x = 8,857.60

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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.