Home / 42,438.30-63,657.60-12,856.38

Finding the Fourth Proportional to 42,438.30, 63,657.60 and 12,856.38

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Solution

The fourth proportional to 42,438.30, 63,657.60 and 12,856.38 is: 19,284.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,438.30 : 63,657.60 = 12,856.38 : x
  2. Step 2: Convert to fraction form
    42,438.30/63,657.60 = 12,856.38/x
  3. Step 3: Cross multiply
    42,438.30x = 63,657.60 × 12,856.38
  4. Step 4: Simplify right side
    42,438.30x = 818,406,295.49
  5. Step 5: Solve for x
    x = 818,406,295.49/42,438.30
  6. Step 6: Final answer
    x = 19,284.62

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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.