Home / 10,385.81-15,582.36-6,485.66

Finding the Fourth Proportional to 10,385.81, 15,582.36 and 6,485.66

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Solution

The fourth proportional to 10,385.81, 15,582.36 and 6,485.66 is: 9,730.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,385.81 : 15,582.36 = 6,485.66 : x
  2. Step 2: Convert to fraction form
    10,385.81/15,582.36 = 6,485.66/x
  3. Step 3: Cross multiply
    10,385.81x = 15,582.36 × 6,485.66
  4. Step 4: Simplify right side
    10,385.81x = 101,061,888.96
  5. Step 5: Solve for x
    x = 101,061,888.96/10,385.81
  6. Step 6: Final answer
    x = 9,730.77

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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.