Home / 42,478.59-63,731.78-12,896.45

Finding the Fourth Proportional to 42,478.59, 63,731.78 and 12,896.45

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Solution

The fourth proportional to 42,478.59, 63,731.78 and 12,896.45 is: 19,348.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,478.59 : 63,731.78 = 12,896.45 : x
  2. Step 2: Convert to fraction form
    42,478.59/63,731.78 = 12,896.45/x
  3. Step 3: Cross multiply
    42,478.59x = 63,731.78 × 12,896.45
  4. Step 4: Simplify right side
    42,478.59x = 821,913,618.40
  5. Step 5: Solve for x
    x = 821,913,618.40/42,478.59
  6. Step 6: Final answer
    x = 19,348.89

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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.