Home / 10,985.80-16,440.90-6,606.40

Finding the Fourth Proportional to 10,985.80, 16,440.90 and 6,606.40

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Solution

The fourth proportional to 10,985.80, 16,440.90 and 6,606.40 is: 9,886.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.80 : 16,440.90 = 6,606.40 : x
  2. Step 2: Convert to fraction form
    10,985.80/16,440.90 = 6,606.40/x
  3. Step 3: Cross multiply
    10,985.80x = 16,440.90 × 6,606.40
  4. Step 4: Simplify right side
    10,985.80x = 108,615,161.76
  5. Step 5: Solve for x
    x = 108,615,161.76/10,985.80
  6. Step 6: Final answer
    x = 9,886.87

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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.