Home / 30,990.39-42,688.58-25,005.30

Finding the Fourth Proportional to 30,990.39, 42,688.58 and 25,005.30

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Solution

The fourth proportional to 30,990.39, 42,688.58 and 25,005.30 is: 34,444.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.39 : 42,688.58 = 25,005.30 : x
  2. Step 2: Convert to fraction form
    30,990.39/42,688.58 = 25,005.30/x
  3. Step 3: Cross multiply
    30,990.39x = 42,688.58 × 25,005.30
  4. Step 4: Simplify right side
    30,990.39x = 1,067,440,749.47
  5. Step 5: Solve for x
    x = 1,067,440,749.47/30,990.39
  6. Step 6: Final answer
    x = 34,444.25

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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.