Home / 28,443.16-42,644.66-12,639.60

Finding the Fourth Proportional to 28,443.16, 42,644.66 and 12,639.60

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Solution

The fourth proportional to 28,443.16, 42,644.66 and 12,639.60 is: 18,950.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,443.16 : 42,644.66 = 12,639.60 : x
  2. Step 2: Convert to fraction form
    28,443.16/42,644.66 = 12,639.60/x
  3. Step 3: Cross multiply
    28,443.16x = 42,644.66 × 12,639.60
  4. Step 4: Simplify right side
    28,443.16x = 539,011,444.54
  5. Step 5: Solve for x
    x = 539,011,444.54/28,443.16
  6. Step 6: Final answer
    x = 18,950.48

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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.