Home / 28,139.19-38,831.94-15,563.94

Finding the Fourth Proportional to 28,139.19, 38,831.94 and 15,563.94

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Solution

The fourth proportional to 28,139.19, 38,831.94 and 15,563.94 is: 21,478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.19 : 38,831.94 = 15,563.94 : x
  2. Step 2: Convert to fraction form
    28,139.19/38,831.94 = 15,563.94/x
  3. Step 3: Cross multiply
    28,139.19x = 38,831.94 × 15,563.94
  4. Step 4: Simplify right side
    28,139.19x = 604,377,984.24
  5. Step 5: Solve for x
    x = 604,377,984.24/28,139.19
  6. Step 6: Final answer
    x = 21,478.16

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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.