Home / 10,518.99-15,780.12-3,124.18

Finding the Fourth Proportional to 10,518.99, 15,780.12 and 3,124.18

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Solution

The fourth proportional to 10,518.99, 15,780.12 and 3,124.18 is: 4,686.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.99 : 15,780.12 = 3,124.18 : x
  2. Step 2: Convert to fraction form
    10,518.99/15,780.12 = 3,124.18/x
  3. Step 3: Cross multiply
    10,518.99x = 15,780.12 × 3,124.18
  4. Step 4: Simplify right side
    10,518.99x = 49,299,935.30
  5. Step 5: Solve for x
    x = 49,299,935.30/10,518.99
  6. Step 6: Final answer
    x = 4,686.76

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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.