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Finding the Fourth Proportional to 18,869.32, 28,303.95 and 5,018.32

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Solution

The fourth proportional to 18,869.32, 28,303.95 and 5,018.32 is: 7,527.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.32 : 28,303.95 = 5,018.32 : x
  2. Step 2: Convert to fraction form
    18,869.32/28,303.95 = 5,018.32/x
  3. Step 3: Cross multiply
    18,869.32x = 28,303.95 × 5,018.32
  4. Step 4: Simplify right side
    18,869.32x = 142,038,278.36
  5. Step 5: Solve for x
    x = 142,038,278.36/18,869.32
  6. Step 6: Final answer
    x = 7,527.47

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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.