Home / 18,931.02-28,399.58-5,780.30

Finding the Fourth Proportional to 18,931.02, 28,399.58 and 5,780.30

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Solution

The fourth proportional to 18,931.02, 28,399.58 and 5,780.30 is: 8,671.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,931.02 : 28,399.58 = 5,780.30 : x
  2. Step 2: Convert to fraction form
    18,931.02/28,399.58 = 5,780.30/x
  3. Step 3: Cross multiply
    18,931.02x = 28,399.58 × 5,780.30
  4. Step 4: Simplify right side
    18,931.02x = 164,158,092.27
  5. Step 5: Solve for x
    x = 164,158,092.27/18,931.02
  6. Step 6: Final answer
    x = 8,671.38

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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.