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Finding the Fourth Proportional to 19,009.30, 28,520.70 and 19,009.30

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Solution

The fourth proportional to 19,009.30, 28,520.70 and 19,009.30 is: 28,520.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.30 : 28,520.70 = 19,009.30 : x
  2. Step 2: Convert to fraction form
    19,009.30/28,520.70 = 19,009.30/x
  3. Step 3: Cross multiply
    19,009.30x = 28,520.70 × 19,009.30
  4. Step 4: Simplify right side
    19,009.30x = 542,158,542.51
  5. Step 5: Solve for x
    x = 542,158,542.51/19,009.30
  6. Step 6: Final answer
    x = 28,520.70

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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.