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Finding the Fourth Proportional to 28,018.40, 42,022.74 and 9,297.68

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Solution

The fourth proportional to 28,018.40, 42,022.74 and 9,297.68 is: 13,944.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,018.40 : 42,022.74 = 9,297.68 : x
  2. Step 2: Convert to fraction form
    28,018.40/42,022.74 = 9,297.68/x
  3. Step 3: Cross multiply
    28,018.40x = 42,022.74 × 9,297.68
  4. Step 4: Simplify right side
    28,018.40x = 390,713,989.24
  5. Step 5: Solve for x
    x = 390,713,989.24/28,018.40
  6. Step 6: Final answer
    x = 13,944.91

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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.