Home / 20,267.40-27,970.56-11,315.28

Finding the Fourth Proportional to 20,267.40, 27,970.56 and 11,315.28

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Solution

The fourth proportional to 20,267.40, 27,970.56 and 11,315.28 is: 15,615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,267.40 : 27,970.56 = 11,315.28 : x
  2. Step 2: Convert to fraction form
    20,267.40/27,970.56 = 11,315.28/x
  3. Step 3: Cross multiply
    20,267.40x = 27,970.56 × 11,315.28
  4. Step 4: Simplify right side
    20,267.40x = 316,494,718.16
  5. Step 5: Solve for x
    x = 316,494,718.16/20,267.40
  6. Step 6: Final answer
    x = 15,615.95

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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.