Home / 15,439.32-21,310.20-9,860.04

Finding the Fourth Proportional to 15,439.32, 21,310.20 and 9,860.04

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Solution

The fourth proportional to 15,439.32, 21,310.20 and 9,860.04 is: 13,609.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,439.32 : 21,310.20 = 9,860.04 : x
  2. Step 2: Convert to fraction form
    15,439.32/21,310.20 = 9,860.04/x
  3. Step 3: Cross multiply
    15,439.32x = 21,310.20 × 9,860.04
  4. Step 4: Simplify right side
    15,439.32x = 210,119,424.41
  5. Step 5: Solve for x
    x = 210,119,424.41/15,439.32
  6. Step 6: Final answer
    x = 13,609.37

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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.