Home / 20,783.63-28,681.56-11,352.20

Finding the Fourth Proportional to 20,783.63, 28,681.56 and 11,352.20

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Solution

The fourth proportional to 20,783.63, 28,681.56 and 11,352.20 is: 15,666.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.63 : 28,681.56 = 11,352.20 : x
  2. Step 2: Convert to fraction form
    20,783.63/28,681.56 = 11,352.20/x
  3. Step 3: Cross multiply
    20,783.63x = 28,681.56 × 11,352.20
  4. Step 4: Simplify right side
    20,783.63x = 325,598,662.02
  5. Step 5: Solve for x
    x = 325,598,662.02/20,783.63
  6. Step 6: Final answer
    x = 15,666.12

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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.