Home / 28,420.02-39,218.19-15,675.42

Finding the Fourth Proportional to 28,420.02, 39,218.19 and 15,675.42

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Solution

The fourth proportional to 28,420.02, 39,218.19 and 15,675.42 is: 21,631.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,420.02 : 39,218.19 = 15,675.42 : x
  2. Step 2: Convert to fraction form
    28,420.02/39,218.19 = 15,675.42/x
  3. Step 3: Cross multiply
    28,420.02x = 39,218.19 × 15,675.42
  4. Step 4: Simplify right side
    28,420.02x = 614,761,599.89
  5. Step 5: Solve for x
    x = 614,761,599.89/28,420.02
  6. Step 6: Final answer
    x = 21,631.29

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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.