Home / 10,005.90-15,004.80-3,428.70

Finding the Fourth Proportional to 10,005.90, 15,004.80 and 3,428.70

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Solution

The fourth proportional to 10,005.90, 15,004.80 and 3,428.70 is: 5,141.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,005.90 : 15,004.80 = 3,428.70 : x
  2. Step 2: Convert to fraction form
    10,005.90/15,004.80 = 3,428.70/x
  3. Step 3: Cross multiply
    10,005.90x = 15,004.80 × 3,428.70
  4. Step 4: Simplify right side
    10,005.90x = 51,446,957.76
  5. Step 5: Solve for x
    x = 51,446,957.76/10,005.90
  6. Step 6: Final answer
    x = 5,141.66

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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.