Home / 10,518.60-15,777.90-3,124.20

Finding the Fourth Proportional to 10,518.60, 15,777.90 and 3,124.20

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Solution

The fourth proportional to 10,518.60, 15,777.90 and 3,124.20 is: 4,686.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.60 : 15,777.90 = 3,124.20 : x
  2. Step 2: Convert to fraction form
    10,518.60/15,777.90 = 3,124.20/x
  3. Step 3: Cross multiply
    10,518.60x = 15,777.90 × 3,124.20
  4. Step 4: Simplify right side
    10,518.60x = 49,293,315.18
  5. Step 5: Solve for x
    x = 49,293,315.18/10,518.60
  6. Step 6: Final answer
    x = 4,686.30

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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.