Home / 12,862.29-17,739.95-8,612

Finding the Fourth Proportional to 12,862.29, 17,739.95 and 8,612

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Solution

The fourth proportional to 12,862.29, 17,739.95 and 8,612 is: 11,877.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,862.29 : 17,739.95 = 8,612 : x
  2. Step 2: Convert to fraction form
    12,862.29/17,739.95 = 8,612/x
  3. Step 3: Cross multiply
    12,862.29x = 17,739.95 × 8,612
  4. Step 4: Simplify right side
    12,862.29x = 152,776,406.34
  5. Step 5: Solve for x
    x = 152,776,406.34/12,862.29
  6. Step 6: Final answer
    x = 11,877.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.