Home / 42,431.12-63,649.88-12,851.34

Finding the Fourth Proportional to 42,431.12, 63,649.88 and 12,851.34

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Solution

The fourth proportional to 42,431.12, 63,649.88 and 12,851.34 is: 19,277.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,431.12 : 63,649.88 = 12,851.34 : x
  2. Step 2: Convert to fraction form
    42,431.12/63,649.88 = 12,851.34/x
  3. Step 3: Cross multiply
    42,431.12x = 63,649.88 × 12,851.34
  4. Step 4: Simplify right side
    42,431.12x = 817,986,184.58
  5. Step 5: Solve for x
    x = 817,986,184.58/42,431.12
  6. Step 6: Final answer
    x = 19,277.98

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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.