Home / 15,717.07-21,708.12-12,106.40

Finding the Fourth Proportional to 15,717.07, 21,708.12 and 12,106.40

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Solution

The fourth proportional to 15,717.07, 21,708.12 and 12,106.40 is: 16,721.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,717.07 : 21,708.12 = 12,106.40 : x
  2. Step 2: Convert to fraction form
    15,717.07/21,708.12 = 12,106.40/x
  3. Step 3: Cross multiply
    15,717.07x = 21,708.12 × 12,106.40
  4. Step 4: Simplify right side
    15,717.07x = 262,807,183.97
  5. Step 5: Solve for x
    x = 262,807,183.97/15,717.07
  6. Step 6: Final answer
    x = 16,721.13

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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.