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Finding the Fourth Proportional to 18,999.33, 28,462.10 and 9,145.53

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Solution

The fourth proportional to 18,999.33, 28,462.10 and 9,145.53 is: 13,700.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,999.33 : 28,462.10 = 9,145.53 : x
  2. Step 2: Convert to fraction form
    18,999.33/28,462.10 = 9,145.53/x
  3. Step 3: Cross multiply
    18,999.33x = 28,462.10 × 9,145.53
  4. Step 4: Simplify right side
    18,999.33x = 260,301,036.60
  5. Step 5: Solve for x
    x = 260,301,036.60/18,999.33
  6. Step 6: Final answer
    x = 13,700.53

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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.