Home / 21,787.60-32,632.80-11,387.20

Finding the Fourth Proportional to 21,787.60, 32,632.80 and 11,387.20

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Solution

The fourth proportional to 21,787.60, 32,632.80 and 11,387.20 is: 17,055.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.60 : 32,632.80 = 11,387.20 : x
  2. Step 2: Convert to fraction form
    21,787.60/32,632.80 = 11,387.20/x
  3. Step 3: Cross multiply
    21,787.60x = 32,632.80 × 11,387.20
  4. Step 4: Simplify right side
    21,787.60x = 371,596,220.16
  5. Step 5: Solve for x
    x = 371,596,220.16/21,787.60
  6. Step 6: Final answer
    x = 17,055.40

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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.