Home / 47,139.89-70,709.81-13,860.23

Finding the Fourth Proportional to 47,139.89, 70,709.81 and 13,860.23

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Solution

The fourth proportional to 47,139.89, 70,709.81 and 13,860.23 is: 20,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,139.89 : 70,709.81 = 13,860.23 : x
  2. Step 2: Convert to fraction form
    47,139.89/70,709.81 = 13,860.23/x
  3. Step 3: Cross multiply
    47,139.89x = 70,709.81 × 13,860.23
  4. Step 4: Simplify right side
    47,139.89x = 980,054,441.28
  5. Step 5: Solve for x
    x = 980,054,441.28/47,139.89
  6. Step 6: Final answer
    x = 20,790.34

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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.