Home / 30,678.24-42,336.90-19,925.76

Finding the Fourth Proportional to 30,678.24, 42,336.90 and 19,925.76

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Solution

The fourth proportional to 30,678.24, 42,336.90 and 19,925.76 is: 27,498.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,678.24 : 42,336.90 = 19,925.76 : x
  2. Step 2: Convert to fraction form
    30,678.24/42,336.90 = 19,925.76/x
  3. Step 3: Cross multiply
    30,678.24x = 42,336.90 × 19,925.76
  4. Step 4: Simplify right side
    30,678.24x = 843,594,908.54
  5. Step 5: Solve for x
    x = 843,594,908.54/30,678.24
  6. Step 6: Final answer
    x = 27,498.15

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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.