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Finding the Fourth Proportional to 28,613.13, 42,911.49 and 9,888.27

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Solution

The fourth proportional to 28,613.13, 42,911.49 and 9,888.27 is: 14,829.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,613.13 : 42,911.49 = 9,888.27 : x
  2. Step 2: Convert to fraction form
    28,613.13/42,911.49 = 9,888.27/x
  3. Step 3: Cross multiply
    28,613.13x = 42,911.49 × 9,888.27
  4. Step 4: Simplify right side
    28,613.13x = 424,320,399.22
  5. Step 5: Solve for x
    x = 424,320,399.22/28,613.13
  6. Step 6: Final answer
    x = 14,829.57

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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.