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Finding the Fourth Proportional to 21,890.31, 32,840.08 and 7,098.07

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Solution

The fourth proportional to 21,890.31, 32,840.08 and 7,098.07 is: 10,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,890.31 : 32,840.08 = 7,098.07 : x
  2. Step 2: Convert to fraction form
    21,890.31/32,840.08 = 7,098.07/x
  3. Step 3: Cross multiply
    21,890.31x = 32,840.08 × 7,098.07
  4. Step 4: Simplify right side
    21,890.31x = 233,101,151.16
  5. Step 5: Solve for x
    x = 233,101,151.16/21,890.31
  6. Step 6: Final answer
    x = 10,648.60

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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.