Home / 21,387.20-32,071.20-8,235.20

Finding the Fourth Proportional to 21,387.20, 32,071.20 and 8,235.20

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Solution

The fourth proportional to 21,387.20, 32,071.20 and 8,235.20 is: 12,349.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.20 : 32,071.20 = 8,235.20 : x
  2. Step 2: Convert to fraction form
    21,387.20/32,071.20 = 8,235.20/x
  3. Step 3: Cross multiply
    21,387.20x = 32,071.20 × 8,235.20
  4. Step 4: Simplify right side
    21,387.20x = 264,112,746.24
  5. Step 5: Solve for x
    x = 264,112,746.24/21,387.20
  6. Step 6: Final answer
    x = 12,349.10

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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.