Home / 20,923.68-31,307.08-12,459.22

Finding the Fourth Proportional to 20,923.68, 31,307.08 and 12,459.22

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Solution

The fourth proportional to 20,923.68, 31,307.08 and 12,459.22 is: 18,642.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.68 : 31,307.08 = 12,459.22 : x
  2. Step 2: Convert to fraction form
    20,923.68/31,307.08 = 12,459.22/x
  3. Step 3: Cross multiply
    20,923.68x = 31,307.08 × 12,459.22
  4. Step 4: Simplify right side
    20,923.68x = 390,061,797.28
  5. Step 5: Solve for x
    x = 390,061,797.28/20,923.68
  6. Step 6: Final answer
    x = 18,642.12

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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.