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Finding the Fourth Proportional to 21,959.79, 32,866.79 and 17,556.63

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Solution

The fourth proportional to 21,959.79, 32,866.79 and 17,556.63 is: 26,276.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.79 : 32,866.79 = 17,556.63 : x
  2. Step 2: Convert to fraction form
    21,959.79/32,866.79 = 17,556.63/x
  3. Step 3: Cross multiply
    21,959.79x = 32,866.79 × 17,556.63
  4. Step 4: Simplify right side
    21,959.79x = 577,029,983.53
  5. Step 5: Solve for x
    x = 577,029,983.53/21,959.79
  6. Step 6: Final answer
    x = 26,276.66

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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.