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Finding the Fourth Proportional to 19,310.70, 28,933.65 and 9,428.70

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Solution

The fourth proportional to 19,310.70, 28,933.65 and 9,428.70 is: 14,127.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310.70 : 28,933.65 = 9,428.70 : x
  2. Step 2: Convert to fraction form
    19,310.70/28,933.65 = 9,428.70/x
  3. Step 3: Cross multiply
    19,310.70x = 28,933.65 × 9,428.70
  4. Step 4: Simplify right side
    19,310.70x = 272,806,705.76
  5. Step 5: Solve for x
    x = 272,806,705.76/19,310.70
  6. Step 6: Final answer
    x = 14,127.23

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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.