Home / 15,551.75-21,461.20-9,178.31

Finding the Fourth Proportional to 15,551.75, 21,461.20 and 9,178.31

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Solution

The fourth proportional to 15,551.75, 21,461.20 and 9,178.31 is: 12,665.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.75 : 21,461.20 = 9,178.31 : x
  2. Step 2: Convert to fraction form
    15,551.75/21,461.20 = 9,178.31/x
  3. Step 3: Cross multiply
    15,551.75x = 21,461.20 × 9,178.31
  4. Step 4: Simplify right side
    15,551.75x = 196,977,628.91
  5. Step 5: Solve for x
    x = 196,977,628.91/15,551.75
  6. Step 6: Final answer
    x = 12,665.95

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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.