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Finding the Fourth Proportional to 28,603.90, 42,904.68 and 11,959.66

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Solution

The fourth proportional to 28,603.90, 42,904.68 and 11,959.66 is: 17,939.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,603.90 : 42,904.68 = 11,959.66 : x
  2. Step 2: Convert to fraction form
    28,603.90/42,904.68 = 11,959.66/x
  3. Step 3: Cross multiply
    28,603.90x = 42,904.68 × 11,959.66
  4. Step 4: Simplify right side
    28,603.90x = 513,125,385.21
  5. Step 5: Solve for x
    x = 513,125,385.21/28,603.90
  6. Step 6: Final answer
    x = 17,939.00

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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.