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Finding the Fourth Proportional to 19,009.30, 28,513.95 and 5,158.30

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Solution

The fourth proportional to 19,009.30, 28,513.95 and 5,158.30 is: 7,737.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.30 : 28,513.95 = 5,158.30 : x
  2. Step 2: Convert to fraction form
    19,009.30/28,513.95 = 5,158.30/x
  3. Step 3: Cross multiply
    19,009.30x = 28,513.95 × 5,158.30
  4. Step 4: Simplify right side
    19,009.30x = 147,083,508.29
  5. Step 5: Solve for x
    x = 147,083,508.29/19,009.30
  6. Step 6: Final answer
    x = 7,737.45

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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.