Home / 13,565.32-18,719.70-7,515.31

Finding the Fourth Proportional to 13,565.32, 18,719.70 and 7,515.31

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Solution

The fourth proportional to 13,565.32, 18,719.70 and 7,515.31 is: 10,370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,565.32 : 18,719.70 = 7,515.31 : x
  2. Step 2: Convert to fraction form
    13,565.32/18,719.70 = 7,515.31/x
  3. Step 3: Cross multiply
    13,565.32x = 18,719.70 × 7,515.31
  4. Step 4: Simplify right side
    13,565.32x = 140,684,283.02
  5. Step 5: Solve for x
    x = 140,684,283.02/13,565.32
  6. Step 6: Final answer
    x = 10,370.88

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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.