Home / 13,416.60-18,515.11-7,448.65

Finding the Fourth Proportional to 13,416.60, 18,515.11 and 7,448.65

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Solution

The fourth proportional to 13,416.60, 18,515.11 and 7,448.65 is: 10,279.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.60 : 18,515.11 = 7,448.65 : x
  2. Step 2: Convert to fraction form
    13,416.60/18,515.11 = 7,448.65/x
  3. Step 3: Cross multiply
    13,416.60x = 18,515.11 × 7,448.65
  4. Step 4: Simplify right side
    13,416.60x = 137,912,574.10
  5. Step 5: Solve for x
    x = 137,912,574.10/13,416.60
  6. Step 6: Final answer
    x = 10,279.25

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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.