Home / 15,811.83-21,814.56-12,178.98

Finding the Fourth Proportional to 15,811.83, 21,814.56 and 12,178.98

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Solution

The fourth proportional to 15,811.83, 21,814.56 and 12,178.98 is: 16,802.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.83 : 21,814.56 = 12,178.98 : x
  2. Step 2: Convert to fraction form
    15,811.83/21,814.56 = 12,178.98/x
  3. Step 3: Cross multiply
    15,811.83x = 21,814.56 × 12,178.98
  4. Step 4: Simplify right side
    15,811.83x = 265,679,089.95
  5. Step 5: Solve for x
    x = 265,679,089.95/15,811.83
  6. Step 6: Final answer
    x = 16,802.55

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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.