Home / 15,431.68-21,295.80-8,358.10

Finding the Fourth Proportional to 15,431.68, 21,295.80 and 8,358.10

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Solution

The fourth proportional to 15,431.68, 21,295.80 and 8,358.10 is: 11,534.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.68 : 21,295.80 = 8,358.10 : x
  2. Step 2: Convert to fraction form
    15,431.68/21,295.80 = 8,358.10/x
  3. Step 3: Cross multiply
    15,431.68x = 21,295.80 × 8,358.10
  4. Step 4: Simplify right side
    15,431.68x = 177,992,372.74
  5. Step 5: Solve for x
    x = 177,992,372.74/15,431.68
  6. Step 6: Final answer
    x = 11,534.22

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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.