Home / 42,939.90-64,401.66-13,358.10

Finding the Fourth Proportional to 42,939.90, 64,401.66 and 13,358.10

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Solution

The fourth proportional to 42,939.90, 64,401.66 and 13,358.10 is: 20,034.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,939.90 : 64,401.66 = 13,358.10 : x
  2. Step 2: Convert to fraction form
    42,939.90/64,401.66 = 13,358.10/x
  3. Step 3: Cross multiply
    42,939.90x = 64,401.66 × 13,358.10
  4. Step 4: Simplify right side
    42,939.90x = 860,283,814.45
  5. Step 5: Solve for x
    x = 860,283,814.45/42,939.90
  6. Step 6: Final answer
    x = 20,034.60

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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.