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Finding the Fourth Proportional to 8,702.68, 13,058.88 and 4,085.68

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Solution

The fourth proportional to 8,702.68, 13,058.88 and 4,085.68 is: 6,130.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,702.68 : 13,058.88 = 4,085.68 : x
  2. Step 2: Convert to fraction form
    8,702.68/13,058.88 = 4,085.68/x
  3. Step 3: Cross multiply
    8,702.68x = 13,058.88 × 4,085.68
  4. Step 4: Simplify right side
    8,702.68x = 53,354,404.84
  5. Step 5: Solve for x
    x = 53,354,404.84/8,702.68
  6. Step 6: Final answer
    x = 6,130.80

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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.