Home / 15,113.40-20,853.27-9,143.88

Finding the Fourth Proportional to 15,113.40, 20,853.27 and 9,143.88

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Solution

The fourth proportional to 15,113.40, 20,853.27 and 9,143.88 is: 12,616.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,113.40 : 20,853.27 = 9,143.88 : x
  2. Step 2: Convert to fraction form
    15,113.40/20,853.27 = 9,143.88/x
  3. Step 3: Cross multiply
    15,113.40x = 20,853.27 × 9,143.88
  4. Step 4: Simplify right side
    15,113.40x = 190,679,798.49
  5. Step 5: Solve for x
    x = 190,679,798.49/15,113.40
  6. Step 6: Final answer
    x = 12,616.61

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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.