Home / 21,298.40-31,947.60-10,930.40

Finding the Fourth Proportional to 21,298.40, 31,947.60 and 10,930.40

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Solution

The fourth proportional to 21,298.40, 31,947.60 and 10,930.40 is: 16,395.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,298.40 : 31,947.60 = 10,930.40 : x
  2. Step 2: Convert to fraction form
    21,298.40/31,947.60 = 10,930.40/x
  3. Step 3: Cross multiply
    21,298.40x = 31,947.60 × 10,930.40
  4. Step 4: Simplify right side
    21,298.40x = 349,200,047.04
  5. Step 5: Solve for x
    x = 349,200,047.04/21,298.40
  6. Step 6: Final answer
    x = 16,395.60

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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.