Home / 12,689.12-19,062.88-9,000.48

Finding the Fourth Proportional to 12,689.12, 19,062.88 and 9,000.48

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Solution

The fourth proportional to 12,689.12, 19,062.88 and 9,000.48 is: 13,521.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.12 : 19,062.88 = 9,000.48 : x
  2. Step 2: Convert to fraction form
    12,689.12/19,062.88 = 9,000.48/x
  3. Step 3: Cross multiply
    12,689.12x = 19,062.88 × 9,000.48
  4. Step 4: Simplify right side
    12,689.12x = 171,575,070.18
  5. Step 5: Solve for x
    x = 171,575,070.18/12,689.12
  6. Step 6: Final answer
    x = 13,521.43

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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.