Home / 10,478.32-15,718.40-2,687.12

Finding the Fourth Proportional to 10,478.32, 15,718.40 and 2,687.12

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Solution

The fourth proportional to 10,478.32, 15,718.40 and 2,687.12 is: 4,030.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,478.32 : 15,718.40 = 2,687.12 : x
  2. Step 2: Convert to fraction form
    10,478.32/15,718.40 = 2,687.12/x
  3. Step 3: Cross multiply
    10,478.32x = 15,718.40 × 2,687.12
  4. Step 4: Simplify right side
    10,478.32x = 42,237,227.01
  5. Step 5: Solve for x
    x = 42,237,227.01/10,478.32
  6. Step 6: Final answer
    x = 4,030.92

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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.