Home / 15,459.87-21,334.68-8,386.35

Finding the Fourth Proportional to 15,459.87, 21,334.68 and 8,386.35

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Solution

The fourth proportional to 15,459.87, 21,334.68 and 8,386.35 is: 11,573.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.87 : 21,334.68 = 8,386.35 : x
  2. Step 2: Convert to fraction form
    15,459.87/21,334.68 = 8,386.35/x
  3. Step 3: Cross multiply
    15,459.87x = 21,334.68 × 8,386.35
  4. Step 4: Simplify right side
    15,459.87x = 178,920,013.61
  5. Step 5: Solve for x
    x = 178,920,013.61/15,459.87
  6. Step 6: Final answer
    x = 11,573.19

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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.