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Finding the Fourth Proportional to 21,875.20, 32,812.80 and 19,340.80

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Solution

The fourth proportional to 21,875.20, 32,812.80 and 19,340.80 is: 29,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.20 : 32,812.80 = 19,340.80 : x
  2. Step 2: Convert to fraction form
    21,875.20/32,812.80 = 19,340.80/x
  3. Step 3: Cross multiply
    21,875.20x = 32,812.80 × 19,340.80
  4. Step 4: Simplify right side
    21,875.20x = 634,625,802.24
  5. Step 5: Solve for x
    x = 634,625,802.24/21,875.20
  6. Step 6: Final answer
    x = 29,011.20

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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.