Home / 14,560.56-21,728.16-12,987.90

Finding the Fourth Proportional to 14,560.56, 21,728.16 and 12,987.90

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Solution

The fourth proportional to 14,560.56, 21,728.16 and 12,987.90 is: 19,381.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,560.56 : 21,728.16 = 12,987.90 : x
  2. Step 2: Convert to fraction form
    14,560.56/21,728.16 = 12,987.90/x
  3. Step 3: Cross multiply
    14,560.56x = 21,728.16 × 12,987.90
  4. Step 4: Simplify right side
    14,560.56x = 282,203,169.26
  5. Step 5: Solve for x
    x = 282,203,169.26/14,560.56
  6. Step 6: Final answer
    x = 19,381.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.