Home / 28,007.04-42,018.36-12,213.45

Finding the Fourth Proportional to 28,007.04, 42,018.36 and 12,213.45

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Solution

The fourth proportional to 28,007.04, 42,018.36 and 12,213.45 is: 18,323.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.04 : 42,018.36 = 12,213.45 : x
  2. Step 2: Convert to fraction form
    28,007.04/42,018.36 = 12,213.45/x
  3. Step 3: Cross multiply
    28,007.04x = 42,018.36 × 12,213.45
  4. Step 4: Simplify right side
    28,007.04x = 513,189,138.94
  5. Step 5: Solve for x
    x = 513,189,138.94/28,007.04
  6. Step 6: Final answer
    x = 18,323.58

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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.