Home / 15,386.42-21,231.48-9,421.58

Finding the Fourth Proportional to 15,386.42, 21,231.48 and 9,421.58

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Solution

The fourth proportional to 15,386.42, 21,231.48 and 9,421.58 is: 13,000.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,386.42 : 21,231.48 = 9,421.58 : x
  2. Step 2: Convert to fraction form
    15,386.42/21,231.48 = 9,421.58/x
  3. Step 3: Cross multiply
    15,386.42x = 21,231.48 × 9,421.58
  4. Step 4: Simplify right side
    15,386.42x = 200,034,087.34
  5. Step 5: Solve for x
    x = 200,034,087.34/15,386.42
  6. Step 6: Final answer
    x = 13,000.69

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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.