Home / 10,981.80-15,145.65-8,461.08

Finding the Fourth Proportional to 10,981.80, 15,145.65 and 8,461.08

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Solution

The fourth proportional to 10,981.80, 15,145.65 and 8,461.08 is: 11,669.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,981.80 : 15,145.65 = 8,461.08 : x
  2. Step 2: Convert to fraction form
    10,981.80/15,145.65 = 8,461.08/x
  3. Step 3: Cross multiply
    10,981.80x = 15,145.65 × 8,461.08
  4. Step 4: Simplify right side
    10,981.80x = 128,148,556.30
  5. Step 5: Solve for x
    x = 128,148,556.30/10,981.80
  6. Step 6: Final answer
    x = 11,669.18

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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.