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Finding the Fourth Proportional to 19,140.93, 28,698.93 and 6,660

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Solution

The fourth proportional to 19,140.93, 28,698.93 and 6,660 is: 9,985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,140.93 : 28,698.93 = 6,660 : x
  2. Step 2: Convert to fraction form
    19,140.93/28,698.93 = 6,660/x
  3. Step 3: Cross multiply
    19,140.93x = 28,698.93 × 6,660
  4. Step 4: Simplify right side
    19,140.93x = 191,134,873.80
  5. Step 5: Solve for x
    x = 191,134,873.80/19,140.93
  6. Step 6: Final answer
    x = 9,985.66

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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.