Home / 15,901.80-21,935.25-13,395.66

Finding the Fourth Proportional to 15,901.80, 21,935.25 and 13,395.66

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Solution

The fourth proportional to 15,901.80, 21,935.25 and 13,395.66 is: 18,478.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,901.80 : 21,935.25 = 13,395.66 : x
  2. Step 2: Convert to fraction form
    15,901.80/21,935.25 = 13,395.66/x
  3. Step 3: Cross multiply
    15,901.80x = 21,935.25 × 13,395.66
  4. Step 4: Simplify right side
    15,901.80x = 293,837,151.02
  5. Step 5: Solve for x
    x = 293,837,151.02/15,901.80
  6. Step 6: Final answer
    x = 18,478.23

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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.