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Finding the Fourth Proportional to 28,042.79, 42,064.45 and 8,321.35

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Solution

The fourth proportional to 28,042.79, 42,064.45 and 8,321.35 is: 12,482.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,042.79 : 42,064.45 = 8,321.35 : x
  2. Step 2: Convert to fraction form
    28,042.79/42,064.45 = 8,321.35/x
  3. Step 3: Cross multiply
    28,042.79x = 42,064.45 × 8,321.35
  4. Step 4: Simplify right side
    28,042.79x = 350,032,969.40
  5. Step 5: Solve for x
    x = 350,032,969.40/28,042.79
  6. Step 6: Final answer
    x = 12,482.10

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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.