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Finding the Fourth Proportional to 9,368.84, 12,927.12 and 5,390.12

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Solution

The fourth proportional to 9,368.84, 12,927.12 and 5,390.12 is: 7,437.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.84 : 12,927.12 = 5,390.12 : x
  2. Step 2: Convert to fraction form
    9,368.84/12,927.12 = 5,390.12/x
  3. Step 3: Cross multiply
    9,368.84x = 12,927.12 × 5,390.12
  4. Step 4: Simplify right side
    9,368.84x = 69,678,728.05
  5. Step 5: Solve for x
    x = 69,678,728.05/9,368.84
  6. Step 6: Final answer
    x = 7,437.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.