Home / 30,453.04-42,038.14-18,520.20

Finding the Fourth Proportional to 30,453.04, 42,038.14 and 18,520.20

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Solution

The fourth proportional to 30,453.04, 42,038.14 and 18,520.20 is: 25,565.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,453.04 : 42,038.14 = 18,520.20 : x
  2. Step 2: Convert to fraction form
    30,453.04/42,038.14 = 18,520.20/x
  3. Step 3: Cross multiply
    30,453.04x = 42,038.14 × 18,520.20
  4. Step 4: Simplify right side
    30,453.04x = 778,554,760.43
  5. Step 5: Solve for x
    x = 778,554,760.43/30,453.04
  6. Step 6: Final answer
    x = 25,565.75

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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.