Home / 28,007.52-38,653.10-20,921.64

Finding the Fourth Proportional to 28,007.52, 38,653.10 and 20,921.64

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Solution

The fourth proportional to 28,007.52, 38,653.10 and 20,921.64 is: 28,873.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.52 : 38,653.10 = 20,921.64 : x
  2. Step 2: Convert to fraction form
    28,007.52/38,653.10 = 20,921.64/x
  3. Step 3: Cross multiply
    28,007.52x = 38,653.10 × 20,921.64
  4. Step 4: Simplify right side
    28,007.52x = 808,686,243.08
  5. Step 5: Solve for x
    x = 808,686,243.08/28,007.52
  6. Step 6: Final answer
    x = 28,873.90

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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.