Home / 15,278.77-21,084.52-8,564.39

Finding the Fourth Proportional to 15,278.77, 21,084.52 and 8,564.39

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Solution

The fourth proportional to 15,278.77, 21,084.52 and 8,564.39 is: 11,818.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.77 : 21,084.52 = 8,564.39 : x
  2. Step 2: Convert to fraction form
    15,278.77/21,084.52 = 8,564.39/x
  3. Step 3: Cross multiply
    15,278.77x = 21,084.52 × 8,564.39
  4. Step 4: Simplify right side
    15,278.77x = 180,575,904.00
  5. Step 5: Solve for x
    x = 180,575,904.00/15,278.77
  6. Step 6: Final answer
    x = 11,818.75

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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.