Home / 28,407.12-39,203.54-15,831.84

Finding the Fourth Proportional to 28,407.12, 39,203.54 and 15,831.84

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Solution

The fourth proportional to 28,407.12, 39,203.54 and 15,831.84 is: 21,848.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,407.12 : 39,203.54 = 15,831.84 : x
  2. Step 2: Convert to fraction form
    28,407.12/39,203.54 = 15,831.84/x
  3. Step 3: Cross multiply
    28,407.12x = 39,203.54 × 15,831.84
  4. Step 4: Simplify right side
    28,407.12x = 620,664,172.71
  5. Step 5: Solve for x
    x = 620,664,172.71/28,407.12
  6. Step 6: Final answer
    x = 21,848.89

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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.