Home / 13,572.86-20,266.89-11,978.29

Finding the Fourth Proportional to 13,572.86, 20,266.89 and 11,978.29

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Solution

The fourth proportional to 13,572.86, 20,266.89 and 11,978.29 is: 17,885.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.86 : 20,266.89 = 11,978.29 : x
  2. Step 2: Convert to fraction form
    13,572.86/20,266.89 = 11,978.29/x
  3. Step 3: Cross multiply
    13,572.86x = 20,266.89 × 11,978.29
  4. Step 4: Simplify right side
    13,572.86x = 242,762,685.82
  5. Step 5: Solve for x
    x = 242,762,685.82/13,572.86
  6. Step 6: Final answer
    x = 17,885.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.