Home / 20,643.50-28,483.85-12,571.74

Finding the Fourth Proportional to 20,643.50, 28,483.85 and 12,571.74

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Solution

The fourth proportional to 20,643.50, 28,483.85 and 12,571.74 is: 17,346.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.50 : 28,483.85 = 12,571.74 : x
  2. Step 2: Convert to fraction form
    20,643.50/28,483.85 = 12,571.74/x
  3. Step 3: Cross multiply
    20,643.50x = 28,483.85 × 12,571.74
  4. Step 4: Simplify right side
    20,643.50x = 358,091,493.54
  5. Step 5: Solve for x
    x = 358,091,493.54/20,643.50
  6. Step 6: Final answer
    x = 17,346.46

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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.