Home / 20,901.51-28,853.01-13,357.98

Finding the Fourth Proportional to 20,901.51, 28,853.01 and 13,357.98

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Solution

The fourth proportional to 20,901.51, 28,853.01 and 13,357.98 is: 18,439.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,901.51 : 28,853.01 = 13,357.98 : x
  2. Step 2: Convert to fraction form
    20,901.51/28,853.01 = 13,357.98/x
  3. Step 3: Cross multiply
    20,901.51x = 28,853.01 × 13,357.98
  4. Step 4: Simplify right side
    20,901.51x = 385,417,930.52
  5. Step 5: Solve for x
    x = 385,417,930.52/20,901.51
  6. Step 6: Final answer
    x = 18,439.72

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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.