Home / 30,715.16-42,390.36-17,289.68

Finding the Fourth Proportional to 30,715.16, 42,390.36 and 17,289.68

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Solution

The fourth proportional to 30,715.16, 42,390.36 and 17,289.68 is: 23,861.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,715.16 : 42,390.36 = 17,289.68 : x
  2. Step 2: Convert to fraction form
    30,715.16/42,390.36 = 17,289.68/x
  3. Step 3: Cross multiply
    30,715.16x = 42,390.36 × 17,289.68
  4. Step 4: Simplify right side
    30,715.16x = 732,915,759.48
  5. Step 5: Solve for x
    x = 732,915,759.48/30,715.16
  6. Step 6: Final answer
    x = 23,861.69

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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.