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Finding the Fourth Proportional to 53,071.68, 79,620.48 and 21,915.84

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Solution

The fourth proportional to 53,071.68, 79,620.48 and 21,915.84 is: 32,879.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,071.68 : 79,620.48 = 21,915.84 : x
  2. Step 2: Convert to fraction form
    53,071.68/79,620.48 = 21,915.84/x
  3. Step 3: Cross multiply
    53,071.68x = 79,620.48 × 21,915.84
  4. Step 4: Simplify right side
    53,071.68x = 1,744,949,700.40
  5. Step 5: Solve for x
    x = 1,744,949,700.40/53,071.68
  6. Step 6: Final answer
    x = 32,879.11

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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.