Home / 20,345.07-28,077.21-11,392.01

Finding the Fourth Proportional to 20,345.07, 28,077.21 and 11,392.01

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Solution

The fourth proportional to 20,345.07, 28,077.21 and 11,392.01 is: 15,721.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.07 : 28,077.21 = 11,392.01 : x
  2. Step 2: Convert to fraction form
    20,345.07/28,077.21 = 11,392.01/x
  3. Step 3: Cross multiply
    20,345.07x = 28,077.21 × 11,392.01
  4. Step 4: Simplify right side
    20,345.07x = 319,855,716.71
  5. Step 5: Solve for x
    x = 319,855,716.71/20,345.07
  6. Step 6: Final answer
    x = 15,721.53

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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.