Home / 13,556.64-18,722.76-9,318.88

Finding the Fourth Proportional to 13,556.64, 18,722.76 and 9,318.88

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Solution

The fourth proportional to 13,556.64, 18,722.76 and 9,318.88 is: 12,870.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,556.64 : 18,722.76 = 9,318.88 : x
  2. Step 2: Convert to fraction form
    13,556.64/18,722.76 = 9,318.88/x
  3. Step 3: Cross multiply
    13,556.64x = 18,722.76 × 9,318.88
  4. Step 4: Simplify right side
    13,556.64x = 174,475,153.71
  5. Step 5: Solve for x
    x = 174,475,153.71/13,556.64
  6. Step 6: Final answer
    x = 12,870.09

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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.