Home / 13,705.04-20,551.18-7,129.46

Finding the Fourth Proportional to 13,705.04, 20,551.18 and 7,129.46

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Solution

The fourth proportional to 13,705.04, 20,551.18 and 7,129.46 is: 10,690.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.04 : 20,551.18 = 7,129.46 : x
  2. Step 2: Convert to fraction form
    13,705.04/20,551.18 = 7,129.46/x
  3. Step 3: Cross multiply
    13,705.04x = 20,551.18 × 7,129.46
  4. Step 4: Simplify right side
    13,705.04x = 146,518,849.32
  5. Step 5: Solve for x
    x = 146,518,849.32/13,705.04
  6. Step 6: Final answer
    x = 10,690.87

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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.