Home / 30,988.20-46,485.60-9,920.70

Finding the Fourth Proportional to 30,988.20, 46,485.60 and 9,920.70

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Solution

The fourth proportional to 30,988.20, 46,485.60 and 9,920.70 is: 14,882.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,988.20 : 46,485.60 = 9,920.70 : x
  2. Step 2: Convert to fraction form
    30,988.20/46,485.60 = 9,920.70/x
  3. Step 3: Cross multiply
    30,988.20x = 46,485.60 × 9,920.70
  4. Step 4: Simplify right side
    30,988.20x = 461,169,785.46
  5. Step 5: Solve for x
    x = 461,169,785.46/30,988.20
  6. Step 6: Final answer
    x = 14,882.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.