Home / 21,063.86-31,571.48-7,907.84

Finding the Fourth Proportional to 21,063.86, 31,571.48 and 7,907.84

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Solution

The fourth proportional to 21,063.86, 31,571.48 and 7,907.84 is: 11,852.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,063.86 : 31,571.48 = 7,907.84 : x
  2. Step 2: Convert to fraction form
    21,063.86/31,571.48 = 7,907.84/x
  3. Step 3: Cross multiply
    21,063.86x = 31,571.48 × 7,907.84
  4. Step 4: Simplify right side
    21,063.86x = 249,662,074.32
  5. Step 5: Solve for x
    x = 249,662,074.32/21,063.86
  6. Step 6: Final answer
    x = 11,852.63

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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.