Home / 20,386.48-28,126.70-11,886.68

Finding the Fourth Proportional to 20,386.48, 28,126.70 and 11,886.68

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Solution

The fourth proportional to 20,386.48, 28,126.70 and 11,886.68 is: 16,399.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.48 : 28,126.70 = 11,886.68 : x
  2. Step 2: Convert to fraction form
    20,386.48/28,126.70 = 11,886.68/x
  3. Step 3: Cross multiply
    20,386.48x = 28,126.70 × 11,886.68
  4. Step 4: Simplify right side
    20,386.48x = 334,333,082.36
  5. Step 5: Solve for x
    x = 334,333,082.36/20,386.48
  6. Step 6: Final answer
    x = 16,399.75

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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.