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Finding the Fourth Proportional to 11,256.70, 16,885.05 and 7,320.10

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Solution

The fourth proportional to 11,256.70, 16,885.05 and 7,320.10 is: 10,980.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,256.70 : 16,885.05 = 7,320.10 : x
  2. Step 2: Convert to fraction form
    11,256.70/16,885.05 = 7,320.10/x
  3. Step 3: Cross multiply
    11,256.70x = 16,885.05 × 7,320.10
  4. Step 4: Simplify right side
    11,256.70x = 123,600,254.51
  5. Step 5: Solve for x
    x = 123,600,254.51/11,256.70
  6. Step 6: Final answer
    x = 10,980.15

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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.