Home / 13,931.85-20,880.50-6,904.29

Finding the Fourth Proportional to 13,931.85, 20,880.50 and 6,904.29

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Solution

The fourth proportional to 13,931.85, 20,880.50 and 6,904.29 is: 10,347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.85 : 20,880.50 = 6,904.29 : x
  2. Step 2: Convert to fraction form
    13,931.85/20,880.50 = 6,904.29/x
  3. Step 3: Cross multiply
    13,931.85x = 20,880.50 × 6,904.29
  4. Step 4: Simplify right side
    13,931.85x = 144,164,992.82
  5. Step 5: Solve for x
    x = 144,164,992.82/13,931.85
  6. Step 6: Final answer
    x = 10,347.87

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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.