Home / 42,421.89-63,633.75-12,839.68

Finding the Fourth Proportional to 42,421.89, 63,633.75 and 12,839.68

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Solution

The fourth proportional to 42,421.89, 63,633.75 and 12,839.68 is: 19,259.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,421.89 : 63,633.75 = 12,839.68 : x
  2. Step 2: Convert to fraction form
    42,421.89/63,633.75 = 12,839.68/x
  3. Step 3: Cross multiply
    42,421.89x = 63,633.75 × 12,839.68
  4. Step 4: Simplify right side
    42,421.89x = 817,036,987.20
  5. Step 5: Solve for x
    x = 817,036,987.20/42,421.89
  6. Step 6: Final answer
    x = 19,259.80

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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.