Home / 15,730.76-21,661.61-15,381.51

Finding the Fourth Proportional to 15,730.76, 21,661.61 and 15,381.51

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Solution

The fourth proportional to 15,730.76, 21,661.61 and 15,381.51 is: 21,180.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,730.76 : 21,661.61 = 15,381.51 : x
  2. Step 2: Convert to fraction form
    15,730.76/21,661.61 = 15,381.51/x
  3. Step 3: Cross multiply
    15,730.76x = 21,661.61 × 15,381.51
  4. Step 4: Simplify right side
    15,730.76x = 333,188,193.92
  5. Step 5: Solve for x
    x = 333,188,193.92/15,730.76
  6. Step 6: Final answer
    x = 21,180.69

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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.