Home / 30,700.89-45,973.58-18,978.57

Finding the Fourth Proportional to 30,700.89, 45,973.58 and 18,978.57

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Solution

The fourth proportional to 30,700.89, 45,973.58 and 18,978.57 is: 28,419.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,700.89 : 45,973.58 = 18,978.57 : x
  2. Step 2: Convert to fraction form
    30,700.89/45,973.58 = 18,978.57/x
  3. Step 3: Cross multiply
    30,700.89x = 45,973.58 × 18,978.57
  4. Step 4: Simplify right side
    30,700.89x = 872,512,711.29
  5. Step 5: Solve for x
    x = 872,512,711.29/30,700.89
  6. Step 6: Final answer
    x = 28,419.79

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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.