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Finding the Fourth Proportional to 14,702.16, 20,288.74 and 7,987.89

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Solution

The fourth proportional to 14,702.16, 20,288.74 and 7,987.89 is: 11,023.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,702.16 : 20,288.74 = 7,987.89 : x
  2. Step 2: Convert to fraction form
    14,702.16/20,288.74 = 7,987.89/x
  3. Step 3: Cross multiply
    14,702.16x = 20,288.74 × 7,987.89
  4. Step 4: Simplify right side
    14,702.16x = 162,064,183.42
  5. Step 5: Solve for x
    x = 162,064,183.42/14,702.16
  6. Step 6: Final answer
    x = 11,023.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.