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Finding the Fourth Proportional to 18,888.50, 28,299.95 and 13,254.25

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Solution

The fourth proportional to 18,888.50, 28,299.95 and 13,254.25 is: 19,858.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.50 : 28,299.95 = 13,254.25 : x
  2. Step 2: Convert to fraction form
    18,888.50/28,299.95 = 13,254.25/x
  3. Step 3: Cross multiply
    18,888.50x = 28,299.95 × 13,254.25
  4. Step 4: Simplify right side
    18,888.50x = 375,094,612.29
  5. Step 5: Solve for x
    x = 375,094,612.29/18,888.50
  6. Step 6: Final answer
    x = 19,858.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.