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Finding the Fourth Proportional to 13,598.76, 20,405.16 and 5,805.48

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Solution

The fourth proportional to 13,598.76, 20,405.16 and 5,805.48 is: 8,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,598.76 : 20,405.16 = 5,805.48 : x
  2. Step 2: Convert to fraction form
    13,598.76/20,405.16 = 5,805.48/x
  3. Step 3: Cross multiply
    13,598.76x = 20,405.16 × 5,805.48
  4. Step 4: Simplify right side
    13,598.76x = 118,461,748.28
  5. Step 5: Solve for x
    x = 118,461,748.28/13,598.76
  6. Step 6: Final answer
    x = 8,711.22

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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.