Home / 13,349.85-18,421.16-7,380.69

Finding the Fourth Proportional to 13,349.85, 18,421.16 and 7,380.69

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Solution

The fourth proportional to 13,349.85, 18,421.16 and 7,380.69 is: 10,184.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.85 : 18,421.16 = 7,380.69 : x
  2. Step 2: Convert to fraction form
    13,349.85/18,421.16 = 7,380.69/x
  3. Step 3: Cross multiply
    13,349.85x = 18,421.16 × 7,380.69
  4. Step 4: Simplify right side
    13,349.85x = 135,960,871.40
  5. Step 5: Solve for x
    x = 135,960,871.40/13,349.85
  6. Step 6: Final answer
    x = 10,184.45

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Half scale
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Double scale
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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.