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Finding the Fourth Proportional to 12,240.64, 18,368.06 and 5,220.28

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Solution

The fourth proportional to 12,240.64, 18,368.06 and 5,220.28 is: 7,833.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,240.64 : 18,368.06 = 5,220.28 : x
  2. Step 2: Convert to fraction form
    12,240.64/18,368.06 = 5,220.28/x
  3. Step 3: Cross multiply
    12,240.64x = 18,368.06 × 5,220.28
  4. Step 4: Simplify right side
    12,240.64x = 95,886,416.26
  5. Step 5: Solve for x
    x = 95,886,416.26/12,240.64
  6. Step 6: Final answer
    x = 7,833.45

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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.