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Finding the Fourth Proportional to 28,023, 38,672.55 and 15,448.56

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Solution

The fourth proportional to 28,023, 38,672.55 and 15,448.56 is: 21,319.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,023 : 38,672.55 = 15,448.56 : x
  2. Step 2: Convert to fraction form
    28,023/38,672.55 = 15,448.56/x
  3. Step 3: Cross multiply
    28,023x = 38,672.55 × 15,448.56
  4. Step 4: Simplify right side
    28,023x = 597,435,209.03
  5. Step 5: Solve for x
    x = 597,435,209.03/28,023
  6. Step 6: Final answer
    x = 21,319.46

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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.