Home / 21,128.95-31,646.70-14,449.62

Finding the Fourth Proportional to 21,128.95, 31,646.70 and 14,449.62

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Solution

The fourth proportional to 21,128.95, 31,646.70 and 14,449.62 is: 21,642.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.95 : 31,646.70 = 14,449.62 : x
  2. Step 2: Convert to fraction form
    21,128.95/31,646.70 = 14,449.62/x
  3. Step 3: Cross multiply
    21,128.95x = 31,646.70 × 14,449.62
  4. Step 4: Simplify right side
    21,128.95x = 457,282,701.87
  5. Step 5: Solve for x
    x = 457,282,701.87/21,128.95
  6. Step 6: Final answer
    x = 21,642.47

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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.