Home / 26,638.94-39,970.20-13,985.72

Finding the Fourth Proportional to 26,638.94, 39,970.20 and 13,985.72

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Solution

The fourth proportional to 26,638.94, 39,970.20 and 13,985.72 is: 20,984.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,638.94 : 39,970.20 = 13,985.72 : x
  2. Step 2: Convert to fraction form
    26,638.94/39,970.20 = 13,985.72/x
  3. Step 3: Cross multiply
    26,638.94x = 39,970.20 × 13,985.72
  4. Step 4: Simplify right side
    26,638.94x = 559,012,025.54
  5. Step 5: Solve for x
    x = 559,012,025.54/26,638.94
  6. Step 6: Final answer
    x = 20,984.77

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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.