Home / 19,140.79-28,710.93-6,660.58

Finding the Fourth Proportional to 19,140.79, 28,710.93 and 6,660.58

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Solution

The fourth proportional to 19,140.79, 28,710.93 and 6,660.58 is: 9,990.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.79 : 28,710.93 = 6,660.58 : x
  2. Step 2: Convert to fraction form
    19,140.79/28,710.93 = 6,660.58/x
  3. Step 3: Cross multiply
    19,140.79x = 28,710.93 × 6,660.58
  4. Step 4: Simplify right side
    19,140.79x = 191,231,446.14
  5. Step 5: Solve for x
    x = 191,231,446.14/19,140.79
  6. Step 6: Final answer
    x = 9,990.78

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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.