Home / 20,698.73-28,509.83-15,909.51

Finding the Fourth Proportional to 20,698.73, 28,509.83 and 15,909.51

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Solution

The fourth proportional to 20,698.73, 28,509.83 and 15,909.51 is: 21,913.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.73 : 28,509.83 = 15,909.51 : x
  2. Step 2: Convert to fraction form
    20,698.73/28,509.83 = 15,909.51/x
  3. Step 3: Cross multiply
    20,698.73x = 28,509.83 × 15,909.51
  4. Step 4: Simplify right side
    20,698.73x = 453,577,345.94
  5. Step 5: Solve for x
    x = 453,577,345.94/20,698.73
  6. Step 6: Final answer
    x = 21,913.30

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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.