Home / 21,302.85-29,400.12-12,807.74

Finding the Fourth Proportional to 21,302.85, 29,400.12 and 12,807.74

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Solution

The fourth proportional to 21,302.85, 29,400.12 and 12,807.74 is: 17,676.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,302.85 : 29,400.12 = 12,807.74 : x
  2. Step 2: Convert to fraction form
    21,302.85/29,400.12 = 12,807.74/x
  3. Step 3: Cross multiply
    21,302.85x = 29,400.12 × 12,807.74
  4. Step 4: Simplify right side
    21,302.85x = 376,549,092.93
  5. Step 5: Solve for x
    x = 376,549,092.93/21,302.85
  6. Step 6: Final answer
    x = 17,676.00

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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.