Home / 21,009.40-28,994.34-12,059.80

Finding the Fourth Proportional to 21,009.40, 28,994.34 and 12,059.80

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Solution

The fourth proportional to 21,009.40, 28,994.34 and 12,059.80 is: 16,643.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.40 : 28,994.34 = 12,059.80 : x
  2. Step 2: Convert to fraction form
    21,009.40/28,994.34 = 12,059.80/x
  3. Step 3: Cross multiply
    21,009.40x = 28,994.34 × 12,059.80
  4. Step 4: Simplify right side
    21,009.40x = 349,665,941.53
  5. Step 5: Solve for x
    x = 349,665,941.53/21,009.40
  6. Step 6: Final answer
    x = 16,643.31

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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.