Home / 15,699.33-21,666.28-8,987.06

Finding the Fourth Proportional to 15,699.33, 21,666.28 and 8,987.06

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Solution

The fourth proportional to 15,699.33, 21,666.28 and 8,987.06 is: 12,402.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,699.33 : 21,666.28 = 8,987.06 : x
  2. Step 2: Convert to fraction form
    15,699.33/21,666.28 = 8,987.06/x
  3. Step 3: Cross multiply
    15,699.33x = 21,666.28 × 8,987.06
  4. Step 4: Simplify right side
    15,699.33x = 194,716,158.34
  5. Step 5: Solve for x
    x = 194,716,158.34/15,699.33
  6. Step 6: Final answer
    x = 12,402.83

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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.