Home / 20,617.28-28,466.64-12,670.16

Finding the Fourth Proportional to 20,617.28, 28,466.64 and 12,670.16

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Solution

The fourth proportional to 20,617.28, 28,466.64 and 12,670.16 is: 17,493.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.28 : 28,466.64 = 12,670.16 : x
  2. Step 2: Convert to fraction form
    20,617.28/28,466.64 = 12,670.16/x
  3. Step 3: Cross multiply
    20,617.28x = 28,466.64 × 12,670.16
  4. Step 4: Simplify right side
    20,617.28x = 360,676,883.46
  5. Step 5: Solve for x
    x = 360,676,883.46/20,617.28
  6. Step 6: Final answer
    x = 17,493.91

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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.