Home / 13,938.76-20,913.58-6,142.08

Finding the Fourth Proportional to 13,938.76, 20,913.58 and 6,142.08

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Solution

The fourth proportional to 13,938.76, 20,913.58 and 6,142.08 is: 9,215.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.76 : 20,913.58 = 6,142.08 : x
  2. Step 2: Convert to fraction form
    13,938.76/20,913.58 = 6,142.08/x
  3. Step 3: Cross multiply
    13,938.76x = 20,913.58 × 6,142.08
  4. Step 4: Simplify right side
    13,938.76x = 128,452,881.45
  5. Step 5: Solve for x
    x = 128,452,881.45/13,938.76
  6. Step 6: Final answer
    x = 9,215.52

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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.