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Finding the Fourth Proportional to 12,398.47, 18,486.53 and 12,177.03

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Solution

The fourth proportional to 12,398.47, 18,486.53 and 12,177.03 is: 18,156.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.47 : 18,486.53 = 12,177.03 : x
  2. Step 2: Convert to fraction form
    12,398.47/18,486.53 = 12,177.03/x
  3. Step 3: Cross multiply
    12,398.47x = 18,486.53 × 12,177.03
  4. Step 4: Simplify right side
    12,398.47x = 225,111,084.51
  5. Step 5: Solve for x
    x = 225,111,084.51/12,398.47
  6. Step 6: Final answer
    x = 18,156.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.