Home / 15,628.78-21,570.22-8,916.59

Finding the Fourth Proportional to 15,628.78, 21,570.22 and 8,916.59

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Solution

The fourth proportional to 15,628.78, 21,570.22 and 8,916.59 is: 12,306.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,628.78 : 21,570.22 = 8,916.59 : x
  2. Step 2: Convert to fraction form
    15,628.78/21,570.22 = 8,916.59/x
  3. Step 3: Cross multiply
    15,628.78x = 21,570.22 × 8,916.59
  4. Step 4: Simplify right side
    15,628.78x = 192,332,677.81
  5. Step 5: Solve for x
    x = 192,332,677.81/15,628.78
  6. Step 6: Final answer
    x = 12,306.32

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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.