Home / 15,706.68-21,666.18-9,415.40

Finding the Fourth Proportional to 15,706.68, 21,666.18 and 9,415.40

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Solution

The fourth proportional to 15,706.68, 21,666.18 and 9,415.40 is: 12,987.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,706.68 : 21,666.18 = 9,415.40 : x
  2. Step 2: Convert to fraction form
    15,706.68/21,666.18 = 9,415.40/x
  3. Step 3: Cross multiply
    15,706.68x = 21,666.18 × 9,415.40
  4. Step 4: Simplify right side
    15,706.68x = 203,995,751.17
  5. Step 5: Solve for x
    x = 203,995,751.17/15,706.68
  6. Step 6: Final answer
    x = 12,987.83

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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.