Home / 57,985.20-86,977.80-18,543.60

Finding the Fourth Proportional to 57,985.20, 86,977.80 and 18,543.60

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Solution

The fourth proportional to 57,985.20, 86,977.80 and 18,543.60 is: 27,815.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,985.20 : 86,977.80 = 18,543.60 : x
  2. Step 2: Convert to fraction form
    57,985.20/86,977.80 = 18,543.60/x
  3. Step 3: Cross multiply
    57,985.20x = 86,977.80 × 18,543.60
  4. Step 4: Simplify right side
    57,985.20x = 1,612,881,532.08
  5. Step 5: Solve for x
    x = 1,612,881,532.08/57,985.20
  6. Step 6: Final answer
    x = 27,815.40

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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.