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Finding the Fourth Proportional to 21,798.88, 32,712.68 and 11,945.08

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Solution

The fourth proportional to 21,798.88, 32,712.68 and 11,945.08 is: 17,925.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.88 : 32,712.68 = 11,945.08 : x
  2. Step 2: Convert to fraction form
    21,798.88/32,712.68 = 11,945.08/x
  3. Step 3: Cross multiply
    21,798.88x = 32,712.68 × 11,945.08
  4. Step 4: Simplify right side
    21,798.88x = 390,755,356.33
  5. Step 5: Solve for x
    x = 390,755,356.33/21,798.88
  6. Step 6: Final answer
    x = 17,925.48

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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.