Home / 21,855.38-30,144.02-15,152.22

Finding the Fourth Proportional to 21,855.38, 30,144.02 and 15,152.22

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Solution

The fourth proportional to 21,855.38, 30,144.02 and 15,152.22 is: 20,898.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,855.38 : 30,144.02 = 15,152.22 : x
  2. Step 2: Convert to fraction form
    21,855.38/30,144.02 = 15,152.22/x
  3. Step 3: Cross multiply
    21,855.38x = 30,144.02 × 15,152.22
  4. Step 4: Simplify right side
    21,855.38x = 456,748,746.96
  5. Step 5: Solve for x
    x = 456,748,746.96/21,855.38
  6. Step 6: Final answer
    x = 20,898.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.