Home / 10,129.32-15,274.98-9,990.72

Finding the Fourth Proportional to 10,129.32, 15,274.98 and 9,990.72

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Solution

The fourth proportional to 10,129.32, 15,274.98 and 9,990.72 is: 15,065.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,129.32 : 15,274.98 = 9,990.72 : x
  2. Step 2: Convert to fraction form
    10,129.32/15,274.98 = 9,990.72/x
  3. Step 3: Cross multiply
    10,129.32x = 15,274.98 × 9,990.72
  4. Step 4: Simplify right side
    10,129.32x = 152,608,048.19
  5. Step 5: Solve for x
    x = 152,608,048.19/10,129.32
  6. Step 6: Final answer
    x = 15,065.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.