Home / 28,757.16-39,685.75-15,661.01

Finding the Fourth Proportional to 28,757.16, 39,685.75 and 15,661.01

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Solution

The fourth proportional to 28,757.16, 39,685.75 and 15,661.01 is: 21,612.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,757.16 : 39,685.75 = 15,661.01 : x
  2. Step 2: Convert to fraction form
    28,757.16/39,685.75 = 15,661.01/x
  3. Step 3: Cross multiply
    28,757.16x = 39,685.75 × 15,661.01
  4. Step 4: Simplify right side
    28,757.16x = 621,519,026.82
  5. Step 5: Solve for x
    x = 621,519,026.82/28,757.16
  6. Step 6: Final answer
    x = 21,612.67

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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.