Home / 20,510.09-28,303.93-11,078.66

Finding the Fourth Proportional to 20,510.09, 28,303.93 and 11,078.66

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Solution

The fourth proportional to 20,510.09, 28,303.93 and 11,078.66 is: 15,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.09 : 28,303.93 = 11,078.66 : x
  2. Step 2: Convert to fraction form
    20,510.09/28,303.93 = 11,078.66/x
  3. Step 3: Cross multiply
    20,510.09x = 28,303.93 × 11,078.66
  4. Step 4: Simplify right side
    20,510.09x = 313,569,542.53
  5. Step 5: Solve for x
    x = 313,569,542.53/20,510.09
  6. Step 6: Final answer
    x = 15,288.55

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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.