Home / 15,428.09-21,290.37-8,713.50

Finding the Fourth Proportional to 15,428.09, 21,290.37 and 8,713.50

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Solution

The fourth proportional to 15,428.09, 21,290.37 and 8,713.50 is: 12,024.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,428.09 : 21,290.37 = 8,713.50 : x
  2. Step 2: Convert to fraction form
    15,428.09/21,290.37 = 8,713.50/x
  3. Step 3: Cross multiply
    15,428.09x = 21,290.37 × 8,713.50
  4. Step 4: Simplify right side
    15,428.09x = 185,513,639.00
  5. Step 5: Solve for x
    x = 185,513,639.00/15,428.09
  6. Step 6: Final answer
    x = 12,024.41

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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.