Home / 28,422.09-39,220.78-15,674.67

Finding the Fourth Proportional to 28,422.09, 39,220.78 and 15,674.67

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Solution

The fourth proportional to 28,422.09, 39,220.78 and 15,674.67 is: 21,630.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,422.09 : 39,220.78 = 15,674.67 : x
  2. Step 2: Convert to fraction form
    28,422.09/39,220.78 = 15,674.67/x
  3. Step 3: Cross multiply
    28,422.09x = 39,220.78 × 15,674.67
  4. Step 4: Simplify right side
    28,422.09x = 614,772,783.64
  5. Step 5: Solve for x
    x = 614,772,783.64/28,422.09
  6. Step 6: Final answer
    x = 21,630.10

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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.