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Finding the Fourth Proportional to 21,407.40, 32,111.10 and 19,225.80

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Solution

The fourth proportional to 21,407.40, 32,111.10 and 19,225.80 is: 28,838.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,407.40 : 32,111.10 = 19,225.80 : x
  2. Step 2: Convert to fraction form
    21,407.40/32,111.10 = 19,225.80/x
  3. Step 3: Cross multiply
    21,407.40x = 32,111.10 × 19,225.80
  4. Step 4: Simplify right side
    21,407.40x = 617,361,586.38
  5. Step 5: Solve for x
    x = 617,361,586.38/21,407.40
  6. Step 6: Final answer
    x = 28,838.70

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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.