Home / 20,868.32-28,798.16-11,437.28

Finding the Fourth Proportional to 20,868.32, 28,798.16 and 11,437.28

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Solution

The fourth proportional to 20,868.32, 28,798.16 and 11,437.28 is: 15,783.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.32 : 28,798.16 = 11,437.28 : x
  2. Step 2: Convert to fraction form
    20,868.32/28,798.16 = 11,437.28/x
  3. Step 3: Cross multiply
    20,868.32x = 28,798.16 × 11,437.28
  4. Step 4: Simplify right side
    20,868.32x = 329,372,619.40
  5. Step 5: Solve for x
    x = 329,372,619.40/20,868.32
  6. Step 6: Final answer
    x = 15,783.38

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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.