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Finding the Fourth Proportional to 26,215, 39,289.72 and 20,646.36

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Solution

The fourth proportional to 26,215, 39,289.72 and 20,646.36 is: 30,943.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,215 : 39,289.72 = 20,646.36 : x
  2. Step 2: Convert to fraction form
    26,215/39,289.72 = 20,646.36/x
  3. Step 3: Cross multiply
    26,215x = 39,289.72 × 20,646.36
  4. Step 4: Simplify right side
    26,215x = 811,189,703.42
  5. Step 5: Solve for x
    x = 811,189,703.42/26,215
  6. Step 6: Final answer
    x = 30,943.72

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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.