Home / 15,420.72-23,131.08-7,621.68

Finding the Fourth Proportional to 15,420.72, 23,131.08 and 7,621.68

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Solution

The fourth proportional to 15,420.72, 23,131.08 and 7,621.68 is: 11,432.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,420.72 : 23,131.08 = 7,621.68 : x
  2. Step 2: Convert to fraction form
    15,420.72/23,131.08 = 7,621.68/x
  3. Step 3: Cross multiply
    15,420.72x = 23,131.08 × 7,621.68
  4. Step 4: Simplify right side
    15,420.72x = 176,297,689.81
  5. Step 5: Solve for x
    x = 176,297,689.81/15,420.72
  6. Step 6: Final answer
    x = 11,432.52

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.