Home / 42,639.51-63,930.63-20,440.74

Finding the Fourth Proportional to 42,639.51, 63,930.63 and 20,440.74

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Solution

The fourth proportional to 42,639.51, 63,930.63 and 20,440.74 is: 30,647.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,639.51 : 63,930.63 = 20,440.74 : x
  2. Step 2: Convert to fraction form
    42,639.51/63,930.63 = 20,440.74/x
  3. Step 3: Cross multiply
    42,639.51x = 63,930.63 × 20,440.74
  4. Step 4: Simplify right side
    42,639.51x = 1,306,789,385.87
  5. Step 5: Solve for x
    x = 1,306,789,385.87/42,639.51
  6. Step 6: Final answer
    x = 30,647.38

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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.