Home / 21,305.13-29,401.10-12,807.34

Finding the Fourth Proportional to 21,305.13, 29,401.10 and 12,807.34

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Solution

The fourth proportional to 21,305.13, 29,401.10 and 12,807.34 is: 17,674.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.13 : 29,401.10 = 12,807.34 : x
  2. Step 2: Convert to fraction form
    21,305.13/29,401.10 = 12,807.34/x
  3. Step 3: Cross multiply
    21,305.13x = 29,401.10 × 12,807.34
  4. Step 4: Simplify right side
    21,305.13x = 376,549,913.27
  5. Step 5: Solve for x
    x = 376,549,913.27/21,305.13
  6. Step 6: Final answer
    x = 17,674.15

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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.