Home / 21,247.12-29,197.95-20,271.47

Finding the Fourth Proportional to 21,247.12, 29,197.95 and 20,271.47

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Solution

The fourth proportional to 21,247.12, 29,197.95 and 20,271.47 is: 27,857.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,247.12 : 29,197.95 = 20,271.47 : x
  2. Step 2: Convert to fraction form
    21,247.12/29,197.95 = 20,271.47/x
  3. Step 3: Cross multiply
    21,247.12x = 29,197.95 × 20,271.47
  4. Step 4: Simplify right side
    21,247.12x = 591,885,266.13
  5. Step 5: Solve for x
    x = 591,885,266.13/21,247.12
  6. Step 6: Final answer
    x = 27,857.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.