Home / 42,139.12-63,208.66-12,556.20

Finding the Fourth Proportional to 42,139.12, 63,208.66 and 12,556.20

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Solution

The fourth proportional to 42,139.12, 63,208.66 and 12,556.20 is: 18,834.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,139.12 : 63,208.66 = 12,556.20 : x
  2. Step 2: Convert to fraction form
    42,139.12/63,208.66 = 12,556.20/x
  3. Step 3: Cross multiply
    42,139.12x = 63,208.66 × 12,556.20
  4. Step 4: Simplify right side
    42,139.12x = 793,660,576.69
  5. Step 5: Solve for x
    x = 793,660,576.69/42,139.12
  6. Step 6: Final answer
    x = 18,834.29

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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.