Home / 21,017.80-29,009.51-13,066.03

Finding the Fourth Proportional to 21,017.80, 29,009.51 and 13,066.03

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Solution

The fourth proportional to 21,017.80, 29,009.51 and 13,066.03 is: 18,034.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,017.80 : 29,009.51 = 13,066.03 : x
  2. Step 2: Convert to fraction form
    21,017.80/29,009.51 = 13,066.03/x
  3. Step 3: Cross multiply
    21,017.80x = 29,009.51 × 13,066.03
  4. Step 4: Simplify right side
    21,017.80x = 379,039,127.95
  5. Step 5: Solve for x
    x = 379,039,127.95/21,017.80
  6. Step 6: Final answer
    x = 18,034.20

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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.