Home / 21,559.32-29,753.70-12,129.69

Finding the Fourth Proportional to 21,559.32, 29,753.70 and 12,129.69

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Solution

The fourth proportional to 21,559.32, 29,753.70 and 12,129.69 is: 16,740.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,559.32 : 29,753.70 = 12,129.69 : x
  2. Step 2: Convert to fraction form
    21,559.32/29,753.70 = 12,129.69/x
  3. Step 3: Cross multiply
    21,559.32x = 29,753.70 × 12,129.69
  4. Step 4: Simplify right side
    21,559.32x = 360,903,157.35
  5. Step 5: Solve for x
    x = 360,903,157.35/21,559.32
  6. Step 6: Final answer
    x = 16,740.01

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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.