Home / 21,289.40-31,914.42-10,878.20

Finding the Fourth Proportional to 21,289.40, 31,914.42 and 10,878.20

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Solution

The fourth proportional to 21,289.40, 31,914.42 and 10,878.20 is: 16,307.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.40 : 31,914.42 = 10,878.20 : x
  2. Step 2: Convert to fraction form
    21,289.40/31,914.42 = 10,878.20/x
  3. Step 3: Cross multiply
    21,289.40x = 31,914.42 × 10,878.20
  4. Step 4: Simplify right side
    21,289.40x = 347,171,443.64
  5. Step 5: Solve for x
    x = 347,171,443.64/21,289.40
  6. Step 6: Final answer
    x = 16,307.24

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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.