Home / 20,386.40-28,110.60-14,407.76

Finding the Fourth Proportional to 20,386.40, 28,110.60 and 14,407.76

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Solution

The fourth proportional to 20,386.40, 28,110.60 and 14,407.76 is: 19,866.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.40 : 28,110.60 = 14,407.76 : x
  2. Step 2: Convert to fraction form
    20,386.40/28,110.60 = 14,407.76/x
  3. Step 3: Cross multiply
    20,386.40x = 28,110.60 × 14,407.76
  4. Step 4: Simplify right side
    20,386.40x = 405,010,778.26
  5. Step 5: Solve for x
    x = 405,010,778.26/20,386.40
  6. Step 6: Final answer
    x = 19,866.71

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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.