Home / 18,678.12-28,012.86-5,527.32

Finding the Fourth Proportional to 18,678.12, 28,012.86 and 5,527.32

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Solution

The fourth proportional to 18,678.12, 28,012.86 and 5,527.32 is: 8,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.12 : 28,012.86 = 5,527.32 : x
  2. Step 2: Convert to fraction form
    18,678.12/28,012.86 = 5,527.32/x
  3. Step 3: Cross multiply
    18,678.12x = 28,012.86 × 5,527.32
  4. Step 4: Simplify right side
    18,678.12x = 154,836,041.34
  5. Step 5: Solve for x
    x = 154,836,041.34/18,678.12
  6. Step 6: Final answer
    x = 8,289.70

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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.