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Finding the Fourth Proportional to 7,985.84, 11,025.64 and 7,490.16

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Solution

The fourth proportional to 7,985.84, 11,025.64 and 7,490.16 is: 10,341.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.84 : 11,025.64 = 7,490.16 : x
  2. Step 2: Convert to fraction form
    7,985.84/11,025.64 = 7,490.16/x
  3. Step 3: Cross multiply
    7,985.84x = 11,025.64 × 7,490.16
  4. Step 4: Simplify right side
    7,985.84x = 82,583,807.70
  5. Step 5: Solve for x
    x = 82,583,807.70/7,985.84
  6. Step 6: Final answer
    x = 10,341.28

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Double scale
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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.