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Finding the Fourth Proportional to 28,357.85, 42,543.10 and 8,637.93

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Solution

The fourth proportional to 28,357.85, 42,543.10 and 8,637.93 is: 12,958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,357.85 : 42,543.10 = 8,637.93 : x
  2. Step 2: Convert to fraction form
    28,357.85/42,543.10 = 8,637.93/x
  3. Step 3: Cross multiply
    28,357.85x = 42,543.10 × 8,637.93
  4. Step 4: Simplify right side
    28,357.85x = 367,484,319.78
  5. Step 5: Solve for x
    x = 367,484,319.78/28,357.85
  6. Step 6: Final answer
    x = 12,958.82

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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.