Home / 15,686.54-21,647.18-8,612.98

Finding the Fourth Proportional to 15,686.54, 21,647.18 and 8,612.98

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Solution

The fourth proportional to 15,686.54, 21,647.18 and 8,612.98 is: 11,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.54 : 21,647.18 = 8,612.98 : x
  2. Step 2: Convert to fraction form
    15,686.54/21,647.18 = 8,612.98/x
  3. Step 3: Cross multiply
    15,686.54x = 21,647.18 × 8,612.98
  4. Step 4: Simplify right side
    15,686.54x = 186,446,728.40
  5. Step 5: Solve for x
    x = 186,446,728.40/15,686.54
  6. Step 6: Final answer
    x = 11,885.78

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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.