Home / 39,040.95-53,875.88-21,135.80

Finding the Fourth Proportional to 39,040.95, 53,875.88 and 21,135.80

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Solution

The fourth proportional to 39,040.95, 53,875.88 and 21,135.80 is: 29,167.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,040.95 : 53,875.88 = 21,135.80 : x
  2. Step 2: Convert to fraction form
    39,040.95/53,875.88 = 21,135.80/x
  3. Step 3: Cross multiply
    39,040.95x = 53,875.88 × 21,135.80
  4. Step 4: Simplify right side
    39,040.95x = 1,138,709,449.45
  5. Step 5: Solve for x
    x = 1,138,709,449.45/39,040.95
  6. Step 6: Final answer
    x = 29,167.05

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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.