Home / 42,521.60-63,784.68-12,940.40

Finding the Fourth Proportional to 42,521.60, 63,784.68 and 12,940.40

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Solution

The fourth proportional to 42,521.60, 63,784.68 and 12,940.40 is: 19,411.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,521.60 : 63,784.68 = 12,940.40 : x
  2. Step 2: Convert to fraction form
    42,521.60/63,784.68 = 12,940.40/x
  3. Step 3: Cross multiply
    42,521.60x = 63,784.68 × 12,940.40
  4. Step 4: Simplify right side
    42,521.60x = 825,399,273.07
  5. Step 5: Solve for x
    x = 825,399,273.07/42,521.60
  6. Step 6: Final answer
    x = 19,411.29

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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.