Home / 15,154.83-20,912.16-8,440.20

Finding the Fourth Proportional to 15,154.83, 20,912.16 and 8,440.20

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Solution

The fourth proportional to 15,154.83, 20,912.16 and 8,440.20 is: 11,646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,154.83 : 20,912.16 = 8,440.20 : x
  2. Step 2: Convert to fraction form
    15,154.83/20,912.16 = 8,440.20/x
  3. Step 3: Cross multiply
    15,154.83x = 20,912.16 × 8,440.20
  4. Step 4: Simplify right side
    15,154.83x = 176,502,812.83
  5. Step 5: Solve for x
    x = 176,502,812.83/15,154.83
  6. Step 6: Final answer
    x = 11,646.64

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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.