Home / 13,699.38-18,905.12-7,411.74

Finding the Fourth Proportional to 13,699.38, 18,905.12 and 7,411.74

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Solution

The fourth proportional to 13,699.38, 18,905.12 and 7,411.74 is: 10,228.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.38 : 18,905.12 = 7,411.74 : x
  2. Step 2: Convert to fraction form
    13,699.38/18,905.12 = 7,411.74/x
  3. Step 3: Cross multiply
    13,699.38x = 18,905.12 × 7,411.74
  4. Step 4: Simplify right side
    13,699.38x = 140,119,834.11
  5. Step 5: Solve for x
    x = 140,119,834.11/13,699.38
  6. Step 6: Final answer
    x = 10,228.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.