Home / 27,640.63-38,143.76-15,703.72

Finding the Fourth Proportional to 27,640.63, 38,143.76 and 15,703.72

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Solution

The fourth proportional to 27,640.63, 38,143.76 and 15,703.72 is: 21,670.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,640.63 : 38,143.76 = 15,703.72 : x
  2. Step 2: Convert to fraction form
    27,640.63/38,143.76 = 15,703.72/x
  3. Step 3: Cross multiply
    27,640.63x = 38,143.76 × 15,703.72
  4. Step 4: Simplify right side
    27,640.63x = 598,998,696.81
  5. Step 5: Solve for x
    x = 598,998,696.81/27,640.63
  6. Step 6: Final answer
    x = 21,670.95

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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.