Home / 28,401.30-42,601.55-12,818.90

Finding the Fourth Proportional to 28,401.30, 42,601.55 and 12,818.90

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Solution

The fourth proportional to 28,401.30, 42,601.55 and 12,818.90 is: 19,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,401.30 : 42,601.55 = 12,818.90 : x
  2. Step 2: Convert to fraction form
    28,401.30/42,601.55 = 12,818.90/x
  3. Step 3: Cross multiply
    28,401.30x = 42,601.55 × 12,818.90
  4. Step 4: Simplify right side
    28,401.30x = 546,105,009.30
  5. Step 5: Solve for x
    x = 546,105,009.30/28,401.30
  6. Step 6: Final answer
    x = 19,228.17

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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.