Home / 15,319.94-21,140.80-8,513.64

Finding the Fourth Proportional to 15,319.94, 21,140.80 and 8,513.64

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Solution

The fourth proportional to 15,319.94, 21,140.80 and 8,513.64 is: 11,748.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.94 : 21,140.80 = 8,513.64 : x
  2. Step 2: Convert to fraction form
    15,319.94/21,140.80 = 8,513.64/x
  3. Step 3: Cross multiply
    15,319.94x = 21,140.80 × 8,513.64
  4. Step 4: Simplify right side
    15,319.94x = 179,985,139.23
  5. Step 5: Solve for x
    x = 179,985,139.23/15,319.94
  6. Step 6: Final answer
    x = 11,748.43

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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.