Home / 27,688.05-38,210.40-15,112.80

Finding the Fourth Proportional to 27,688.05, 38,210.40 and 15,112.80

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Solution

The fourth proportional to 27,688.05, 38,210.40 and 15,112.80 is: 20,856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,688.05 : 38,210.40 = 15,112.80 : x
  2. Step 2: Convert to fraction form
    27,688.05/38,210.40 = 15,112.80/x
  3. Step 3: Cross multiply
    27,688.05x = 38,210.40 × 15,112.80
  4. Step 4: Simplify right side
    27,688.05x = 577,466,133.12
  5. Step 5: Solve for x
    x = 577,466,133.12/27,688.05
  6. Step 6: Final answer
    x = 20,856.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.