Home / 20,880.47-28,798.79-12,927.08

Finding the Fourth Proportional to 20,880.47, 28,798.79 and 12,927.08

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Solution

The fourth proportional to 20,880.47, 28,798.79 and 12,927.08 is: 17,829.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.47 : 28,798.79 = 12,927.08 : x
  2. Step 2: Convert to fraction form
    20,880.47/28,798.79 = 12,927.08/x
  3. Step 3: Cross multiply
    20,880.47x = 28,798.79 × 12,927.08
  4. Step 4: Simplify right side
    20,880.47x = 372,284,053.60
  5. Step 5: Solve for x
    x = 372,284,053.60/20,880.47
  6. Step 6: Final answer
    x = 17,829.30

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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.