Home / 15,520.56-21,415.20-14,987.16

Finding the Fourth Proportional to 15,520.56, 21,415.20 and 14,987.16

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Solution

The fourth proportional to 15,520.56, 21,415.20 and 14,987.16 is: 20,679.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.56 : 21,415.20 = 14,987.16 : x
  2. Step 2: Convert to fraction form
    15,520.56/21,415.20 = 14,987.16/x
  3. Step 3: Cross multiply
    15,520.56x = 21,415.20 × 14,987.16
  4. Step 4: Simplify right side
    15,520.56x = 320,953,028.83
  5. Step 5: Solve for x
    x = 320,953,028.83/15,520.56
  6. Step 6: Final answer
    x = 20,679.22

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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.