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Finding the Fourth Proportional to 21,962.40, 33,008.40 and 19,111.20

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Solution

The fourth proportional to 21,962.40, 33,008.40 and 19,111.20 is: 28,723.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,962.40 : 33,008.40 = 19,111.20 : x
  2. Step 2: Convert to fraction form
    21,962.40/33,008.40 = 19,111.20/x
  3. Step 3: Cross multiply
    21,962.40x = 33,008.40 × 19,111.20
  4. Step 4: Simplify right side
    21,962.40x = 630,830,134.08
  5. Step 5: Solve for x
    x = 630,830,134.08/21,962.40
  6. Step 6: Final answer
    x = 28,723.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.