Home / 21,189.04-29,242.20-12,238.20

Finding the Fourth Proportional to 21,189.04, 29,242.20 and 12,238.20

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Solution

The fourth proportional to 21,189.04, 29,242.20 and 12,238.20 is: 16,889.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.04 : 29,242.20 = 12,238.20 : x
  2. Step 2: Convert to fraction form
    21,189.04/29,242.20 = 12,238.20/x
  3. Step 3: Cross multiply
    21,189.04x = 29,242.20 × 12,238.20
  4. Step 4: Simplify right side
    21,189.04x = 357,871,892.04
  5. Step 5: Solve for x
    x = 357,871,892.04/21,189.04
  6. Step 6: Final answer
    x = 16,889.48

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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.