Home / 10,985.40-16,485.78-4,065.72

Finding the Fourth Proportional to 10,985.40, 16,485.78 and 4,065.72

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Solution

The fourth proportional to 10,985.40, 16,485.78 and 4,065.72 is: 6,101.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,985.40 : 16,485.78 = 4,065.72 : x
  2. Step 2: Convert to fraction form
    10,985.40/16,485.78 = 4,065.72/x
  3. Step 3: Cross multiply
    10,985.40x = 16,485.78 × 4,065.72
  4. Step 4: Simplify right side
    10,985.40x = 67,026,565.46
  5. Step 5: Solve for x
    x = 67,026,565.46/10,985.40
  6. Step 6: Final answer
    x = 6,101.42

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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.