Home / 21,259.60-31,813.80-18,516.40

Finding the Fourth Proportional to 21,259.60, 31,813.80 and 18,516.40

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Solution

The fourth proportional to 21,259.60, 31,813.80 and 18,516.40 is: 27,708.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.60 : 31,813.80 = 18,516.40 : x
  2. Step 2: Convert to fraction form
    21,259.60/31,813.80 = 18,516.40/x
  3. Step 3: Cross multiply
    21,259.60x = 31,813.80 × 18,516.40
  4. Step 4: Simplify right side
    21,259.60x = 589,077,046.32
  5. Step 5: Solve for x
    x = 589,077,046.32/21,259.60
  6. Step 6: Final answer
    x = 27,708.75

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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.