Home / 15,431.90-21,296.04-8,358.32

Finding the Fourth Proportional to 15,431.90, 21,296.04 and 8,358.32

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Solution

The fourth proportional to 15,431.90, 21,296.04 and 8,358.32 is: 11,534.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.90 : 21,296.04 = 8,358.32 : x
  2. Step 2: Convert to fraction form
    15,431.90/21,296.04 = 8,358.32/x
  3. Step 3: Cross multiply
    15,431.90x = 21,296.04 × 8,358.32
  4. Step 4: Simplify right side
    15,431.90x = 177,999,117.05
  5. Step 5: Solve for x
    x = 177,999,117.05/15,431.90
  6. Step 6: Final answer
    x = 11,534.49

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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.