Home / 21,529.84-29,711.58-11,970.53

Finding the Fourth Proportional to 21,529.84, 29,711.58 and 11,970.53

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Solution

The fourth proportional to 21,529.84, 29,711.58 and 11,970.53 is: 16,519.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.84 : 29,711.58 = 11,970.53 : x
  2. Step 2: Convert to fraction form
    21,529.84/29,711.58 = 11,970.53/x
  3. Step 3: Cross multiply
    21,529.84x = 29,711.58 × 11,970.53
  4. Step 4: Simplify right side
    21,529.84x = 355,663,256.07
  5. Step 5: Solve for x
    x = 355,663,256.07/21,529.84
  6. Step 6: Final answer
    x = 16,519.55

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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.