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Finding the Fourth Proportional to 8,478.48, 11,700.90 and 4,702.01

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Solution

The fourth proportional to 8,478.48, 11,700.90 and 4,702.01 is: 6,489.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.48 : 11,700.90 = 4,702.01 : x
  2. Step 2: Convert to fraction form
    8,478.48/11,700.90 = 4,702.01/x
  3. Step 3: Cross multiply
    8,478.48x = 11,700.90 × 4,702.01
  4. Step 4: Simplify right side
    8,478.48x = 55,017,710.81
  5. Step 5: Solve for x
    x = 55,017,710.81/8,478.48
  6. Step 6: Final answer
    x = 6,489.10

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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.