Home / 42,007.86-62,990.01-12,421.80

Finding the Fourth Proportional to 42,007.86, 62,990.01 and 12,421.80

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Solution

The fourth proportional to 42,007.86, 62,990.01 and 12,421.80 is: 18,626.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,007.86 : 62,990.01 = 12,421.80 : x
  2. Step 2: Convert to fraction form
    42,007.86/62,990.01 = 12,421.80/x
  3. Step 3: Cross multiply
    42,007.86x = 62,990.01 × 12,421.80
  4. Step 4: Simplify right side
    42,007.86x = 782,449,306.22
  5. Step 5: Solve for x
    x = 782,449,306.22/42,007.86
  6. Step 6: Final answer
    x = 18,626.26

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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.