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Finding the Fourth Proportional to 28,503.18, 42,750.18 and 9,782.46

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Solution

The fourth proportional to 28,503.18, 42,750.18 and 9,782.46 is: 14,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,503.18 : 42,750.18 = 9,782.46 : x
  2. Step 2: Convert to fraction form
    28,503.18/42,750.18 = 9,782.46/x
  3. Step 3: Cross multiply
    28,503.18x = 42,750.18 × 9,782.46
  4. Step 4: Simplify right side
    28,503.18x = 418,201,925.84
  5. Step 5: Solve for x
    x = 418,201,925.84/28,503.18
  6. Step 6: Final answer
    x = 14,672.11

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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.