Home / 20,513.18-28,289.40-13,443.50

Finding the Fourth Proportional to 20,513.18, 28,289.40 and 13,443.50

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Solution

The fourth proportional to 20,513.18, 28,289.40 and 13,443.50 is: 18,539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.18 : 28,289.40 = 13,443.50 : x
  2. Step 2: Convert to fraction form
    20,513.18/28,289.40 = 13,443.50/x
  3. Step 3: Cross multiply
    20,513.18x = 28,289.40 × 13,443.50
  4. Step 4: Simplify right side
    20,513.18x = 380,308,548.90
  5. Step 5: Solve for x
    x = 380,308,548.90/20,513.18
  6. Step 6: Final answer
    x = 18,539.72

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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.