Home / 42,940.80-64,422.18-13,358.90

Finding the Fourth Proportional to 42,940.80, 64,422.18 and 13,358.90

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Solution

The fourth proportional to 42,940.80, 64,422.18 and 13,358.90 is: 20,041.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,940.80 : 64,422.18 = 13,358.90 : x
  2. Step 2: Convert to fraction form
    42,940.80/64,422.18 = 13,358.90/x
  3. Step 3: Cross multiply
    42,940.80x = 64,422.18 × 13,358.90
  4. Step 4: Simplify right side
    42,940.80x = 860,609,138.29
  5. Step 5: Solve for x
    x = 860,609,138.29/42,940.80
  6. Step 6: Final answer
    x = 20,041.76

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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.