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Finding the Fourth Proportional to 18,888.76, 26,085.36 and 15,564.52

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Solution

The fourth proportional to 18,888.76, 26,085.36 and 15,564.52 is: 21,494.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.76 : 26,085.36 = 15,564.52 : x
  2. Step 2: Convert to fraction form
    18,888.76/26,085.36 = 15,564.52/x
  3. Step 3: Cross multiply
    18,888.76x = 26,085.36 × 15,564.52
  4. Step 4: Simplify right side
    18,888.76x = 406,006,107.43
  5. Step 5: Solve for x
    x = 406,006,107.43/18,888.76
  6. Step 6: Final answer
    x = 21,494.59

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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.