Home / 21,507.03-29,661.93-13,008.78

Finding the Fourth Proportional to 21,507.03, 29,661.93 and 13,008.78

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Solution

The fourth proportional to 21,507.03, 29,661.93 and 13,008.78 is: 17,941.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,507.03 : 29,661.93 = 13,008.78 : x
  2. Step 2: Convert to fraction form
    21,507.03/29,661.93 = 13,008.78/x
  3. Step 3: Cross multiply
    21,507.03x = 29,661.93 × 13,008.78
  4. Step 4: Simplify right side
    21,507.03x = 385,865,521.75
  5. Step 5: Solve for x
    x = 385,865,521.75/21,507.03
  6. Step 6: Final answer
    x = 17,941.37

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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.