Home / 10,210.61-15,315.89-2,815.11

Finding the Fourth Proportional to 10,210.61, 15,315.89 and 2,815.11

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Solution

The fourth proportional to 10,210.61, 15,315.89 and 2,815.11 is: 4,222.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,210.61 : 15,315.89 = 2,815.11 : x
  2. Step 2: Convert to fraction form
    10,210.61/15,315.89 = 2,815.11/x
  3. Step 3: Cross multiply
    10,210.61x = 15,315.89 × 2,815.11
  4. Step 4: Simplify right side
    10,210.61x = 43,115,901.02
  5. Step 5: Solve for x
    x = 43,115,901.02/10,210.61
  6. Step 6: Final answer
    x = 4,222.66

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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.