Home / 30,773.02-42,455.30-20,685.48

Finding the Fourth Proportional to 30,773.02, 42,455.30 and 20,685.48

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Solution

The fourth proportional to 30,773.02, 42,455.30 and 20,685.48 is: 28,538.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,773.02 : 42,455.30 = 20,685.48 : x
  2. Step 2: Convert to fraction form
    30,773.02/42,455.30 = 20,685.48/x
  3. Step 3: Cross multiply
    30,773.02x = 42,455.30 × 20,685.48
  4. Step 4: Simplify right side
    30,773.02x = 878,208,259.04
  5. Step 5: Solve for x
    x = 878,208,259.04/30,773.02
  6. Step 6: Final answer
    x = 28,538.25

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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.