Home / 28,247.74-38,980.56-15,500.64

Finding the Fourth Proportional to 28,247.74, 38,980.56 and 15,500.64

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Solution

The fourth proportional to 28,247.74, 38,980.56 and 15,500.64 is: 21,390.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,247.74 : 38,980.56 = 15,500.64 : x
  2. Step 2: Convert to fraction form
    28,247.74/38,980.56 = 15,500.64/x
  3. Step 3: Cross multiply
    28,247.74x = 38,980.56 × 15,500.64
  4. Step 4: Simplify right side
    28,247.74x = 604,223,627.56
  5. Step 5: Solve for x
    x = 604,223,627.56/28,247.74
  6. Step 6: Final answer
    x = 21,390.16

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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.