Home / 13,328.64-19,987.12-7,087.20

Finding the Fourth Proportional to 13,328.64, 19,987.12 and 7,087.20

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Solution

The fourth proportional to 13,328.64, 19,987.12 and 7,087.20 is: 10,627.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,328.64 : 19,987.12 = 7,087.20 : x
  2. Step 2: Convert to fraction form
    13,328.64/19,987.12 = 7,087.20/x
  3. Step 3: Cross multiply
    13,328.64x = 19,987.12 × 7,087.20
  4. Step 4: Simplify right side
    13,328.64x = 141,652,716.86
  5. Step 5: Solve for x
    x = 141,652,716.86/13,328.64
  6. Step 6: Final answer
    x = 10,627.69

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1.5x scale

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.