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Finding the Fourth Proportional to 18,127.93, 25,036.80 and 12,480

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Solution

The fourth proportional to 18,127.93, 25,036.80 and 12,480 is: 17,236.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,127.93 : 25,036.80 = 12,480 : x
  2. Step 2: Convert to fraction form
    18,127.93/25,036.80 = 12,480/x
  3. Step 3: Cross multiply
    18,127.93x = 25,036.80 × 12,480
  4. Step 4: Simplify right side
    18,127.93x = 312,459,264
  5. Step 5: Solve for x
    x = 312,459,264/18,127.93
  6. Step 6: Final answer
    x = 17,236.35

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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.