Home / 28,302.02-42,343.28-20,422.68

Finding the Fourth Proportional to 28,302.02, 42,343.28 and 20,422.68

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Solution

The fourth proportional to 28,302.02, 42,343.28 and 20,422.68 is: 30,554.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,302.02 : 42,343.28 = 20,422.68 : x
  2. Step 2: Convert to fraction form
    28,302.02/42,343.28 = 20,422.68/x
  3. Step 3: Cross multiply
    28,302.02x = 42,343.28 × 20,422.68
  4. Step 4: Simplify right side
    28,302.02x = 864,763,257.59
  5. Step 5: Solve for x
    x = 864,763,257.59/28,302.02
  6. Step 6: Final answer
    x = 30,554.82

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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.