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Finding the Fourth Proportional to 18,555.60, 27,784.80 and 13,598.40

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Solution

The fourth proportional to 18,555.60, 27,784.80 and 13,598.40 is: 20,361.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.60 : 27,784.80 = 13,598.40 : x
  2. Step 2: Convert to fraction form
    18,555.60/27,784.80 = 13,598.40/x
  3. Step 3: Cross multiply
    18,555.60x = 27,784.80 × 13,598.40
  4. Step 4: Simplify right side
    18,555.60x = 377,828,824.32
  5. Step 5: Solve for x
    x = 377,828,824.32/18,555.60
  6. Step 6: Final answer
    x = 20,361.98

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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.