Home / 21,780.95-30,066.88-14,716.94

Finding the Fourth Proportional to 21,780.95, 30,066.88 and 14,716.94

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Solution

The fourth proportional to 21,780.95, 30,066.88 and 14,716.94 is: 20,315.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.95 : 30,066.88 = 14,716.94 : x
  2. Step 2: Convert to fraction form
    21,780.95/30,066.88 = 14,716.94/x
  3. Step 3: Cross multiply
    21,780.95x = 30,066.88 × 14,716.94
  4. Step 4: Simplify right side
    21,780.95x = 442,492,281.82
  5. Step 5: Solve for x
    x = 442,492,281.82/21,780.95
  6. Step 6: Final answer
    x = 20,315.57

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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.