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Finding the Fourth Proportional to 28,393.40, 42,588.56 and 8,670.42

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Solution

The fourth proportional to 28,393.40, 42,588.56 and 8,670.42 is: 13,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,393.40 : 42,588.56 = 8,670.42 : x
  2. Step 2: Convert to fraction form
    28,393.40/42,588.56 = 8,670.42/x
  3. Step 3: Cross multiply
    28,393.40x = 42,588.56 × 8,670.42
  4. Step 4: Simplify right side
    28,393.40x = 369,260,702.40
  5. Step 5: Solve for x
    x = 369,260,702.40/28,393.40
  6. Step 6: Final answer
    x = 13,005.16

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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.