Home / 53,990.74-80,985.96-18,930.40

Finding the Fourth Proportional to 53,990.74, 80,985.96 and 18,930.40

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Solution

The fourth proportional to 53,990.74, 80,985.96 and 18,930.40 is: 28,395.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,990.74 : 80,985.96 = 18,930.40 : x
  2. Step 2: Convert to fraction form
    53,990.74/80,985.96 = 18,930.40/x
  3. Step 3: Cross multiply
    53,990.74x = 80,985.96 × 18,930.40
  4. Step 4: Simplify right side
    53,990.74x = 1,533,096,617.18
  5. Step 5: Solve for x
    x = 1,533,096,617.18/53,990.74
  6. Step 6: Final answer
    x = 28,395.55

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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.