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Finding the Fourth Proportional to 19,146.79, 28,730 and 7,910.47

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Solution

The fourth proportional to 19,146.79, 28,730 and 7,910.47 is: 11,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,146.79 : 28,730 = 7,910.47 : x
  2. Step 2: Convert to fraction form
    19,146.79/28,730 = 7,910.47/x
  3. Step 3: Cross multiply
    19,146.79x = 28,730 × 7,910.47
  4. Step 4: Simplify right side
    19,146.79x = 227,267,803.10
  5. Step 5: Solve for x
    x = 227,267,803.10/19,146.79
  6. Step 6: Final answer
    x = 11,869.76

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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.