Home / 15,640.19-21,581.49-12,461.54

Finding the Fourth Proportional to 15,640.19, 21,581.49 and 12,461.54

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Solution

The fourth proportional to 15,640.19, 21,581.49 and 12,461.54 is: 17,195.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,640.19 : 21,581.49 = 12,461.54 : x
  2. Step 2: Convert to fraction form
    15,640.19/21,581.49 = 12,461.54/x
  3. Step 3: Cross multiply
    15,640.19x = 21,581.49 × 12,461.54
  4. Step 4: Simplify right side
    15,640.19x = 268,938,600.89
  5. Step 5: Solve for x
    x = 268,938,600.89/15,640.19
  6. Step 6: Final answer
    x = 17,195.35

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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.