Home / 42,161.28-63,284.60-21,116.40

Finding the Fourth Proportional to 42,161.28, 63,284.60 and 21,116.40

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Solution

The fourth proportional to 42,161.28, 63,284.60 and 21,116.40 is: 31,695.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,161.28 : 63,284.60 = 21,116.40 : x
  2. Step 2: Convert to fraction form
    42,161.28/63,284.60 = 21,116.40/x
  3. Step 3: Cross multiply
    42,161.28x = 63,284.60 × 21,116.40
  4. Step 4: Simplify right side
    42,161.28x = 1,336,342,927.44
  5. Step 5: Solve for x
    x = 1,336,342,927.44/42,161.28
  6. Step 6: Final answer
    x = 31,695.98

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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.