Home / 20,130.93-27,780.75-11,178.45

Finding the Fourth Proportional to 20,130.93, 27,780.75 and 11,178.45

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Solution

The fourth proportional to 20,130.93, 27,780.75 and 11,178.45 is: 15,426.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.93 : 27,780.75 = 11,178.45 : x
  2. Step 2: Convert to fraction form
    20,130.93/27,780.75 = 11,178.45/x
  3. Step 3: Cross multiply
    20,130.93x = 27,780.75 × 11,178.45
  4. Step 4: Simplify right side
    20,130.93x = 310,545,724.84
  5. Step 5: Solve for x
    x = 310,545,724.84/20,130.93
  6. Step 6: Final answer
    x = 15,426.30

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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.