Home / 30,508.08-42,088.64-18,561.84

Finding the Fourth Proportional to 30,508.08, 42,088.64 and 18,561.84

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Solution

The fourth proportional to 30,508.08, 42,088.64 and 18,561.84 is: 25,607.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,508.08 : 42,088.64 = 18,561.84 : x
  2. Step 2: Convert to fraction form
    30,508.08/42,088.64 = 18,561.84/x
  3. Step 3: Cross multiply
    30,508.08x = 42,088.64 × 18,561.84
  4. Step 4: Simplify right side
    30,508.08x = 781,242,601.50
  5. Step 5: Solve for x
    x = 781,242,601.50/30,508.08
  6. Step 6: Final answer
    x = 25,607.73

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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.