Home / 21,186.84-31,740.12-14,145.60

Finding the Fourth Proportional to 21,186.84, 31,740.12 and 14,145.60

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Solution

The fourth proportional to 21,186.84, 31,740.12 and 14,145.60 is: 21,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,186.84 : 31,740.12 = 14,145.60 : x
  2. Step 2: Convert to fraction form
    21,186.84/31,740.12 = 14,145.60/x
  3. Step 3: Cross multiply
    21,186.84x = 31,740.12 × 14,145.60
  4. Step 4: Simplify right side
    21,186.84x = 448,983,041.47
  5. Step 5: Solve for x
    x = 448,983,041.47/21,186.84
  6. Step 6: Final answer
    x = 21,191.60

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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.