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Finding the Fourth Proportional to 28,498.61, 42,721.74 and 10,955.22

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Solution

The fourth proportional to 28,498.61, 42,721.74 and 10,955.22 is: 16,422.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,498.61 : 42,721.74 = 10,955.22 : x
  2. Step 2: Convert to fraction form
    28,498.61/42,721.74 = 10,955.22/x
  3. Step 3: Cross multiply
    28,498.61x = 42,721.74 × 10,955.22
  4. Step 4: Simplify right side
    28,498.61x = 468,026,060.48
  5. Step 5: Solve for x
    x = 468,026,060.48/28,498.61
  6. Step 6: Final answer
    x = 16,422.77

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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.