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Finding the Fourth Proportional to 21,999.79, 32,999.14 and 6,417.55

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Solution

The fourth proportional to 21,999.79, 32,999.14 and 6,417.55 is: 9,626.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.79 : 32,999.14 = 6,417.55 : x
  2. Step 2: Convert to fraction form
    21,999.79/32,999.14 = 6,417.55/x
  3. Step 3: Cross multiply
    21,999.79x = 32,999.14 × 6,417.55
  4. Step 4: Simplify right side
    21,999.79x = 211,773,630.91
  5. Step 5: Solve for x
    x = 211,773,630.91/21,999.79
  6. Step 6: Final answer
    x = 9,626.17

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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.