Home / 21,165.79-29,209.71-12,666.29

Finding the Fourth Proportional to 21,165.79, 29,209.71 and 12,666.29

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Solution

The fourth proportional to 21,165.79, 29,209.71 and 12,666.29 is: 17,480.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.79 : 29,209.71 = 12,666.29 : x
  2. Step 2: Convert to fraction form
    21,165.79/29,209.71 = 12,666.29/x
  3. Step 3: Cross multiply
    21,165.79x = 29,209.71 × 12,666.29
  4. Step 4: Simplify right side
    21,165.79x = 369,978,657.68
  5. Step 5: Solve for x
    x = 369,978,657.68/21,165.79
  6. Step 6: Final answer
    x = 17,480.03

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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.