Home / 15,278.36-21,084.71-8,564.11

Finding the Fourth Proportional to 15,278.36, 21,084.71 and 8,564.11

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Solution

The fourth proportional to 15,278.36, 21,084.71 and 8,564.11 is: 11,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.36 : 21,084.71 = 8,564.11 : x
  2. Step 2: Convert to fraction form
    15,278.36/21,084.71 = 8,564.11/x
  3. Step 3: Cross multiply
    15,278.36x = 21,084.71 × 8,564.11
  4. Step 4: Simplify right side
    15,278.36x = 180,571,798.83
  5. Step 5: Solve for x
    x = 180,571,798.83/15,278.36
  6. Step 6: Final answer
    x = 11,818.80

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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.