Home / 21,619.64-32,439.54-21,270.20

Finding the Fourth Proportional to 21,619.64, 32,439.54 and 21,270.20

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Solution

The fourth proportional to 21,619.64, 32,439.54 and 21,270.20 is: 31,915.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,619.64 : 32,439.54 = 21,270.20 : x
  2. Step 2: Convert to fraction form
    21,619.64/32,439.54 = 21,270.20/x
  3. Step 3: Cross multiply
    21,619.64x = 32,439.54 × 21,270.20
  4. Step 4: Simplify right side
    21,619.64x = 689,995,503.71
  5. Step 5: Solve for x
    x = 689,995,503.71/21,619.64
  6. Step 6: Final answer
    x = 31,915.22

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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.