Home / 28,669.85-43,018.90-12,885.78

Finding the Fourth Proportional to 28,669.85, 43,018.90 and 12,885.78

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Solution

The fourth proportional to 28,669.85, 43,018.90 and 12,885.78 is: 19,335.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,669.85 : 43,018.90 = 12,885.78 : x
  2. Step 2: Convert to fraction form
    28,669.85/43,018.90 = 12,885.78/x
  3. Step 3: Cross multiply
    28,669.85x = 43,018.90 × 12,885.78
  4. Step 4: Simplify right side
    28,669.85x = 554,332,210.35
  5. Step 5: Solve for x
    x = 554,332,210.35/28,669.85
  6. Step 6: Final answer
    x = 19,335.02

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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.