Home / 15,357.08-21,191.03-8,642.57

Finding the Fourth Proportional to 15,357.08, 21,191.03 and 8,642.57

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Solution

The fourth proportional to 15,357.08, 21,191.03 and 8,642.57 is: 11,925.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,357.08 : 21,191.03 = 8,642.57 : x
  2. Step 2: Convert to fraction form
    15,357.08/21,191.03 = 8,642.57/x
  3. Step 3: Cross multiply
    15,357.08x = 21,191.03 × 8,642.57
  4. Step 4: Simplify right side
    15,357.08x = 183,144,810.98
  5. Step 5: Solve for x
    x = 183,144,810.98/15,357.08
  6. Step 6: Final answer
    x = 11,925.76

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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.