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Finding the Fourth Proportional to 28,689.90, 42,986.30 and 17,573.40

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Solution

The fourth proportional to 28,689.90, 42,986.30 and 17,573.40 is: 26,330.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,689.90 : 42,986.30 = 17,573.40 : x
  2. Step 2: Convert to fraction form
    28,689.90/42,986.30 = 17,573.40/x
  3. Step 3: Cross multiply
    28,689.90x = 42,986.30 × 17,573.40
  4. Step 4: Simplify right side
    28,689.90x = 755,415,444.42
  5. Step 5: Solve for x
    x = 755,415,444.42/28,689.90
  6. Step 6: Final answer
    x = 26,330.36

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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.