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Finding the Fourth Proportional to 9,815.30, 14,701.35 and 8,720.90

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Solution

The fourth proportional to 9,815.30, 14,701.35 and 8,720.90 is: 13,062.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,815.30 : 14,701.35 = 8,720.90 : x
  2. Step 2: Convert to fraction form
    9,815.30/14,701.35 = 8,720.90/x
  3. Step 3: Cross multiply
    9,815.30x = 14,701.35 × 8,720.90
  4. Step 4: Simplify right side
    9,815.30x = 128,209,003.22
  5. Step 5: Solve for x
    x = 128,209,003.22/9,815.30
  6. Step 6: Final answer
    x = 13,062.16

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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.