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Finding the Fourth Proportional to 15,395.94, 21,245.94 and 8,681.76

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Solution

The fourth proportional to 15,395.94, 21,245.94 and 8,681.76 is: 11,980.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,395.94 : 21,245.94 = 8,681.76 : x
  2. Step 2: Convert to fraction form
    15,395.94/21,245.94 = 8,681.76/x
  3. Step 3: Cross multiply
    15,395.94x = 21,245.94 × 8,681.76
  4. Step 4: Simplify right side
    15,395.94x = 184,452,152.05
  5. Step 5: Solve for x
    x = 184,452,152.05/15,395.94
  6. Step 6: Final answer
    x = 11,980.57

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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.