Home / 21,259.72-29,337.96-12,307.60

Finding the Fourth Proportional to 21,259.72, 29,337.96 and 12,307.60

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Solution

The fourth proportional to 21,259.72, 29,337.96 and 12,307.60 is: 16,984.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.72 : 29,337.96 = 12,307.60 : x
  2. Step 2: Convert to fraction form
    21,259.72/29,337.96 = 12,307.60/x
  3. Step 3: Cross multiply
    21,259.72x = 29,337.96 × 12,307.60
  4. Step 4: Simplify right side
    21,259.72x = 361,079,876.50
  5. Step 5: Solve for x
    x = 361,079,876.50/21,259.72
  6. Step 6: Final answer
    x = 16,984.23

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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.