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Finding the Fourth Proportional to 15,279.02, 21,085.02 and 8,564.65

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Solution

The fourth proportional to 15,279.02, 21,085.02 and 8,564.65 is: 11,819.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,279.02 : 21,085.02 = 8,564.65 : x
  2. Step 2: Convert to fraction form
    15,279.02/21,085.02 = 8,564.65/x
  3. Step 3: Cross multiply
    15,279.02x = 21,085.02 × 8,564.65
  4. Step 4: Simplify right side
    15,279.02x = 180,585,795.95
  5. Step 5: Solve for x
    x = 180,585,795.95/15,279.02
  6. Step 6: Final answer
    x = 11,819.20

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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.