Home / 21,009.07-31,513.61-5,426.70

Finding the Fourth Proportional to 21,009.07, 31,513.61 and 5,426.70

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Solution

The fourth proportional to 21,009.07, 31,513.61 and 5,426.70 is: 8,140.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.07 : 31,513.61 = 5,426.70 : x
  2. Step 2: Convert to fraction form
    21,009.07/31,513.61 = 5,426.70/x
  3. Step 3: Cross multiply
    21,009.07x = 31,513.61 × 5,426.70
  4. Step 4: Simplify right side
    21,009.07x = 171,014,907.39
  5. Step 5: Solve for x
    x = 171,014,907.39/21,009.07
  6. Step 6: Final answer
    x = 8,140.05

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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.