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Finding the Fourth Proportional to 13,361.60, 18,444.90 and 7,985.93

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Solution

The fourth proportional to 13,361.60, 18,444.90 and 7,985.93 is: 11,024.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.60 : 18,444.90 = 7,985.93 : x
  2. Step 2: Convert to fraction form
    13,361.60/18,444.90 = 7,985.93/x
  3. Step 3: Cross multiply
    13,361.60x = 18,444.90 × 7,985.93
  4. Step 4: Simplify right side
    13,361.60x = 147,299,588.03
  5. Step 5: Solve for x
    x = 147,299,588.03/13,361.60
  6. Step 6: Final answer
    x = 11,024.10

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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.