Home / 30,458.04-42,033.70-18,519.40

Finding the Fourth Proportional to 30,458.04, 42,033.70 and 18,519.40

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Solution

The fourth proportional to 30,458.04, 42,033.70 and 18,519.40 is: 25,557.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,458.04 : 42,033.70 = 18,519.40 : x
  2. Step 2: Convert to fraction form
    30,458.04/42,033.70 = 18,519.40/x
  3. Step 3: Cross multiply
    30,458.04x = 42,033.70 × 18,519.40
  4. Step 4: Simplify right side
    30,458.04x = 778,438,903.78
  5. Step 5: Solve for x
    x = 778,438,903.78/30,458.04
  6. Step 6: Final answer
    x = 25,557.75

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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.