Home / 30,709.52-42,390.08-18,134.32

Finding the Fourth Proportional to 30,709.52, 42,390.08 and 18,134.32

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Solution

The fourth proportional to 30,709.52, 42,390.08 and 18,134.32 is: 25,031.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,709.52 : 42,390.08 = 18,134.32 : x
  2. Step 2: Convert to fraction form
    30,709.52/42,390.08 = 18,134.32/x
  3. Step 3: Cross multiply
    30,709.52x = 42,390.08 × 18,134.32
  4. Step 4: Simplify right side
    30,709.52x = 768,715,275.55
  5. Step 5: Solve for x
    x = 768,715,275.55/30,709.52
  6. Step 6: Final answer
    x = 25,031.82

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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.