Home / 28,436.83-42,655.21-12,638.19

Finding the Fourth Proportional to 28,436.83, 42,655.21 and 12,638.19

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Solution

The fourth proportional to 28,436.83, 42,655.21 and 12,638.19 is: 18,957.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,436.83 : 42,655.21 = 12,638.19 : x
  2. Step 2: Convert to fraction form
    28,436.83/42,655.21 = 12,638.19/x
  3. Step 3: Cross multiply
    28,436.83x = 42,655.21 × 12,638.19
  4. Step 4: Simplify right side
    28,436.83x = 539,084,648.47
  5. Step 5: Solve for x
    x = 539,084,648.47/28,436.83
  6. Step 6: Final answer
    x = 18,957.27

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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.