Home / 21,712.40-32,482.20-18,822.80

Finding the Fourth Proportional to 21,712.40, 32,482.20 and 18,822.80

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Solution

The fourth proportional to 21,712.40, 32,482.20 and 18,822.80 is: 28,159.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,712.40 : 32,482.20 = 18,822.80 : x
  2. Step 2: Convert to fraction form
    21,712.40/32,482.20 = 18,822.80/x
  3. Step 3: Cross multiply
    21,712.40x = 32,482.20 × 18,822.80
  4. Step 4: Simplify right side
    21,712.40x = 611,405,954.16
  5. Step 5: Solve for x
    x = 611,405,954.16/21,712.40
  6. Step 6: Final answer
    x = 28,159.30

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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.