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Finding the Fourth Proportional to 26,947.10, 40,420.65 and 20,386.10

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Solution

The fourth proportional to 26,947.10, 40,420.65 and 20,386.10 is: 30,579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,947.10 : 40,420.65 = 20,386.10 : x
  2. Step 2: Convert to fraction form
    26,947.10/40,420.65 = 20,386.10/x
  3. Step 3: Cross multiply
    26,947.10x = 40,420.65 × 20,386.10
  4. Step 4: Simplify right side
    26,947.10x = 824,019,412.97
  5. Step 5: Solve for x
    x = 824,019,412.97/26,947.10
  6. Step 6: Final answer
    x = 30,579.15

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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.