Home / 15,215.20-21,002.34-8,929.60

Finding the Fourth Proportional to 15,215.20, 21,002.34 and 8,929.60

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Solution

The fourth proportional to 15,215.20, 21,002.34 and 8,929.60 is: 12,326.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.20 : 21,002.34 = 8,929.60 : x
  2. Step 2: Convert to fraction form
    15,215.20/21,002.34 = 8,929.60/x
  3. Step 3: Cross multiply
    15,215.20x = 21,002.34 × 8,929.60
  4. Step 4: Simplify right side
    15,215.20x = 187,542,495.26
  5. Step 5: Solve for x
    x = 187,542,495.26/15,215.20
  6. Step 6: Final answer
    x = 12,326.00

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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.