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Finding the Fourth Proportional to 28,228.81, 38,956.02 and 15,482.11

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Solution

The fourth proportional to 28,228.81, 38,956.02 and 15,482.11 is: 21,365.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,228.81 : 38,956.02 = 15,482.11 : x
  2. Step 2: Convert to fraction form
    28,228.81/38,956.02 = 15,482.11/x
  3. Step 3: Cross multiply
    28,228.81x = 38,956.02 × 15,482.11
  4. Step 4: Simplify right side
    28,228.81x = 603,121,386.80
  5. Step 5: Solve for x
    x = 603,121,386.80/28,228.81
  6. Step 6: Final answer
    x = 21,365.46

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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.