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Finding the Fourth Proportional to 18,991.92, 28,490.04 and 7,303.08

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Solution

The fourth proportional to 18,991.92, 28,490.04 and 7,303.08 is: 10,955.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.92 : 28,490.04 = 7,303.08 : x
  2. Step 2: Convert to fraction form
    18,991.92/28,490.04 = 7,303.08/x
  3. Step 3: Cross multiply
    18,991.92x = 28,490.04 × 7,303.08
  4. Step 4: Simplify right side
    18,991.92x = 208,065,041.32
  5. Step 5: Solve for x
    x = 208,065,041.32/18,991.92
  6. Step 6: Final answer
    x = 10,955.45

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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.