Home / 15,400.46-21,252.39-8,686.10

Finding the Fourth Proportional to 15,400.46, 21,252.39 and 8,686.10

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Solution

The fourth proportional to 15,400.46, 21,252.39 and 8,686.10 is: 11,986.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.46 : 21,252.39 = 8,686.10 : x
  2. Step 2: Convert to fraction form
    15,400.46/21,252.39 = 8,686.10/x
  3. Step 3: Cross multiply
    15,400.46x = 21,252.39 × 8,686.10
  4. Step 4: Simplify right side
    15,400.46x = 184,600,384.78
  5. Step 5: Solve for x
    x = 184,600,384.78/15,400.46
  6. Step 6: Final answer
    x = 11,986.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.