Home / 20,386.49-28,134.51-15,341.66

Finding the Fourth Proportional to 20,386.49, 28,134.51 and 15,341.66

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Solution

The fourth proportional to 20,386.49, 28,134.51 and 15,341.66 is: 21,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.49 : 28,134.51 = 15,341.66 : x
  2. Step 2: Convert to fraction form
    20,386.49/28,134.51 = 15,341.66/x
  3. Step 3: Cross multiply
    20,386.49x = 28,134.51 × 15,341.66
  4. Step 4: Simplify right side
    20,386.49x = 431,630,086.69
  5. Step 5: Solve for x
    x = 431,630,086.69/20,386.49
  6. Step 6: Final answer
    x = 21,172.36

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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.