Home / 15,278.80-21,085.90-8,564.72

Finding the Fourth Proportional to 15,278.80, 21,085.90 and 8,564.72

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Solution

The fourth proportional to 15,278.80, 21,085.90 and 8,564.72 is: 11,819.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.80 : 21,085.90 = 8,564.72 : x
  2. Step 2: Convert to fraction form
    15,278.80/21,085.90 = 8,564.72/x
  3. Step 3: Cross multiply
    15,278.80x = 21,085.90 × 8,564.72
  4. Step 4: Simplify right side
    15,278.80x = 180,594,829.45
  5. Step 5: Solve for x
    x = 180,594,829.45/15,278.80
  6. Step 6: Final answer
    x = 11,819.96

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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.