Home / 15,278.81-21,084.48-8,564.58

Finding the Fourth Proportional to 15,278.81, 21,084.48 and 8,564.58

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Solution

The fourth proportional to 15,278.81, 21,084.48 and 8,564.58 is: 11,818.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,278.81 : 21,084.48 = 8,564.58 : x
  2. Step 2: Convert to fraction form
    15,278.81/21,084.48 = 8,564.58/x
  3. Step 3: Cross multiply
    15,278.81x = 21,084.48 × 8,564.58
  4. Step 4: Simplify right side
    15,278.81x = 180,579,715.72
  5. Step 5: Solve for x
    x = 180,579,715.72/15,278.81
  6. Step 6: Final answer
    x = 11,818.97

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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.