Home / 20,669.80-28,515.54-12,709.48

Finding the Fourth Proportional to 20,669.80, 28,515.54 and 12,709.48

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Solution

The fourth proportional to 20,669.80, 28,515.54 and 12,709.48 is: 17,533.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.80 : 28,515.54 = 12,709.48 : x
  2. Step 2: Convert to fraction form
    20,669.80/28,515.54 = 12,709.48/x
  3. Step 3: Cross multiply
    20,669.80x = 28,515.54 × 12,709.48
  4. Step 4: Simplify right side
    20,669.80x = 362,417,685.32
  5. Step 5: Solve for x
    x = 362,417,685.32/20,669.80
  6. Step 6: Final answer
    x = 17,533.68

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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.