Home / 11,290.28-15,575.40-7,312.72

Finding the Fourth Proportional to 11,290.28, 15,575.40 and 7,312.72

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Solution

The fourth proportional to 11,290.28, 15,575.40 and 7,312.72 is: 10,088.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,290.28 : 15,575.40 = 7,312.72 : x
  2. Step 2: Convert to fraction form
    11,290.28/15,575.40 = 7,312.72/x
  3. Step 3: Cross multiply
    11,290.28x = 15,575.40 × 7,312.72
  4. Step 4: Simplify right side
    11,290.28x = 113,898,539.09
  5. Step 5: Solve for x
    x = 113,898,539.09/11,290.28
  6. Step 6: Final answer
    x = 10,088.19

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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.