Home / 20,783.48-28,681.98-11,352.11

Finding the Fourth Proportional to 20,783.48, 28,681.98 and 11,352.11

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Solution

The fourth proportional to 20,783.48, 28,681.98 and 11,352.11 is: 15,666.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.48 : 28,681.98 = 11,352.11 : x
  2. Step 2: Convert to fraction form
    20,783.48/28,681.98 = 11,352.11/x
  3. Step 3: Cross multiply
    20,783.48x = 28,681.98 × 11,352.11
  4. Step 4: Simplify right side
    20,783.48x = 325,600,991.98
  5. Step 5: Solve for x
    x = 325,600,991.98/20,783.48
  6. Step 6: Final answer
    x = 15,666.34

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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.