Home / 21,962.61-30,306.55-12,887.01

Finding the Fourth Proportional to 21,962.61, 30,306.55 and 12,887.01

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Solution

The fourth proportional to 21,962.61, 30,306.55 and 12,887.01 is: 17,782.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,962.61 : 30,306.55 = 12,887.01 : x
  2. Step 2: Convert to fraction form
    21,962.61/30,306.55 = 12,887.01/x
  3. Step 3: Cross multiply
    21,962.61x = 30,306.55 × 12,887.01
  4. Step 4: Simplify right side
    21,962.61x = 390,560,879.19
  5. Step 5: Solve for x
    x = 390,560,879.19/21,962.61
  6. Step 6: Final answer
    x = 17,782.99

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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.