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Finding the Fourth Proportional to 30,803.72, 42,509 and 16,656.52

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Solution

The fourth proportional to 30,803.72, 42,509 and 16,656.52 is: 22,985.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,803.72 : 42,509 = 16,656.52 : x
  2. Step 2: Convert to fraction form
    30,803.72/42,509 = 16,656.52/x
  3. Step 3: Cross multiply
    30,803.72x = 42,509 × 16,656.52
  4. Step 4: Simplify right side
    30,803.72x = 708,052,008.68
  5. Step 5: Solve for x
    x = 708,052,008.68/30,803.72
  6. Step 6: Final answer
    x = 22,985.93

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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.