Home / 39,778.68-54,895.99-21,875.05

Finding the Fourth Proportional to 39,778.68, 54,895.99 and 21,875.05

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Solution

The fourth proportional to 39,778.68, 54,895.99 and 21,875.05 is: 30,188.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.68 : 54,895.99 = 21,875.05 : x
  2. Step 2: Convert to fraction form
    39,778.68/54,895.99 = 21,875.05/x
  3. Step 3: Cross multiply
    39,778.68x = 54,895.99 × 21,875.05
  4. Step 4: Simplify right side
    39,778.68x = 1,200,852,526.05
  5. Step 5: Solve for x
    x = 1,200,852,526.05/39,778.68
  6. Step 6: Final answer
    x = 30,188.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.