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Finding the Fourth Proportional to 15,204.58, 20,980.47 and 8,490.58

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Solution

The fourth proportional to 15,204.58, 20,980.47 and 8,490.58 is: 11,715.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.58 : 20,980.47 = 8,490.58 : x
  2. Step 2: Convert to fraction form
    15,204.58/20,980.47 = 8,490.58/x
  3. Step 3: Cross multiply
    15,204.58x = 20,980.47 × 8,490.58
  4. Step 4: Simplify right side
    15,204.58x = 178,136,358.97
  5. Step 5: Solve for x
    x = 178,136,358.97/15,204.58
  6. Step 6: Final answer
    x = 11,715.97

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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.