Home / 21,015.07-28,995.67-12,511.74

Finding the Fourth Proportional to 21,015.07, 28,995.67 and 12,511.74

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Solution

The fourth proportional to 21,015.07, 28,995.67 and 12,511.74 is: 17,263.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.07 : 28,995.67 = 12,511.74 : x
  2. Step 2: Convert to fraction form
    21,015.07/28,995.67 = 12,511.74/x
  3. Step 3: Cross multiply
    21,015.07x = 28,995.67 × 12,511.74
  4. Step 4: Simplify right side
    21,015.07x = 362,786,284.17
  5. Step 5: Solve for x
    x = 362,786,284.17/21,015.07
  6. Step 6: Final answer
    x = 17,263.15

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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.