Home / 13,281.64-19,911.90-9,111.40

Finding the Fourth Proportional to 13,281.64, 19,911.90 and 9,111.40

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Solution

The fourth proportional to 13,281.64, 19,911.90 and 9,111.40 is: 13,659.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,281.64 : 19,911.90 = 9,111.40 : x
  2. Step 2: Convert to fraction form
    13,281.64/19,911.90 = 9,111.40/x
  3. Step 3: Cross multiply
    13,281.64x = 19,911.90 × 9,111.40
  4. Step 4: Simplify right side
    13,281.64x = 181,425,285.66
  5. Step 5: Solve for x
    x = 181,425,285.66/13,281.64
  6. Step 6: Final answer
    x = 13,659.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.