Home / 20,937.78-31,403.40-13,594.32

Finding the Fourth Proportional to 20,937.78, 31,403.40 and 13,594.32

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Solution

The fourth proportional to 20,937.78, 31,403.40 and 13,594.32 is: 20,389.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.78 : 31,403.40 = 13,594.32 : x
  2. Step 2: Convert to fraction form
    20,937.78/31,403.40 = 13,594.32/x
  3. Step 3: Cross multiply
    20,937.78x = 31,403.40 × 13,594.32
  4. Step 4: Simplify right side
    20,937.78x = 426,907,868.69
  5. Step 5: Solve for x
    x = 426,907,868.69/20,937.78
  6. Step 6: Final answer
    x = 20,389.36

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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.