Home / 28,237.32-38,966.40-15,661.80

Finding the Fourth Proportional to 28,237.32, 38,966.40 and 15,661.80

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Solution

The fourth proportional to 28,237.32, 38,966.40 and 15,661.80 is: 21,612.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,237.32 : 38,966.40 = 15,661.80 : x
  2. Step 2: Convert to fraction form
    28,237.32/38,966.40 = 15,661.80/x
  3. Step 3: Cross multiply
    28,237.32x = 38,966.40 × 15,661.80
  4. Step 4: Simplify right side
    28,237.32x = 610,283,963.52
  5. Step 5: Solve for x
    x = 610,283,963.52/28,237.32
  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.