Home / 21,905.20-32,862.60-7,111.60

Finding the Fourth Proportional to 21,905.20, 32,862.60 and 7,111.60

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Solution

The fourth proportional to 21,905.20, 32,862.60 and 7,111.60 is: 10,668.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.20 : 32,862.60 = 7,111.60 : x
  2. Step 2: Convert to fraction form
    21,905.20/32,862.60 = 7,111.60/x
  3. Step 3: Cross multiply
    21,905.20x = 32,862.60 × 7,111.60
  4. Step 4: Simplify right side
    21,905.20x = 233,705,666.16
  5. Step 5: Solve for x
    x = 233,705,666.16/21,905.20
  6. Step 6: Final answer
    x = 10,668.96

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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.