Home / 13,320.12-18,385.99-8,281.36

Finding the Fourth Proportional to 13,320.12, 18,385.99 and 8,281.36

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Solution

The fourth proportional to 13,320.12, 18,385.99 and 8,281.36 is: 11,430.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,320.12 : 18,385.99 = 8,281.36 : x
  2. Step 2: Convert to fraction form
    13,320.12/18,385.99 = 8,281.36/x
  3. Step 3: Cross multiply
    13,320.12x = 18,385.99 × 8,281.36
  4. Step 4: Simplify right side
    13,320.12x = 152,261,056.14
  5. Step 5: Solve for x
    x = 152,261,056.14/13,320.12
  6. Step 6: Final answer
    x = 11,430.91

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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.