Home / 15,647.12-21,595.03-8,931.21

Finding the Fourth Proportional to 15,647.12, 21,595.03 and 8,931.21

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Solution

The fourth proportional to 15,647.12, 21,595.03 and 8,931.21 is: 12,326.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,647.12 : 21,595.03 = 8,931.21 : x
  2. Step 2: Convert to fraction form
    15,647.12/21,595.03 = 8,931.21/x
  3. Step 3: Cross multiply
    15,647.12x = 21,595.03 × 8,931.21
  4. Step 4: Simplify right side
    15,647.12x = 192,869,639.91
  5. Step 5: Solve for x
    x = 192,869,639.91/15,647.12
  6. Step 6: Final answer
    x = 12,326.21

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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.