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Finding the Fourth Proportional to 28,474.90, 42,683.76 and 9,742.12

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Solution

The fourth proportional to 28,474.90, 42,683.76 and 9,742.12 is: 14,603.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.90 : 42,683.76 = 9,742.12 : x
  2. Step 2: Convert to fraction form
    28,474.90/42,683.76 = 9,742.12/x
  3. Step 3: Cross multiply
    28,474.90x = 42,683.76 × 9,742.12
  4. Step 4: Simplify right side
    28,474.90x = 415,830,311.97
  5. Step 5: Solve for x
    x = 415,830,311.97/28,474.90
  6. Step 6: Final answer
    x = 14,603.40

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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.