Home / 15,459.68-21,334.36-8,386.08

Finding the Fourth Proportional to 15,459.68, 21,334.36 and 8,386.08

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Solution

The fourth proportional to 15,459.68, 21,334.36 and 8,386.08 is: 11,572.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,459.68 : 21,334.36 = 8,386.08 : x
  2. Step 2: Convert to fraction form
    15,459.68/21,334.36 = 8,386.08/x
  3. Step 3: Cross multiply
    15,459.68x = 21,334.36 × 8,386.08
  4. Step 4: Simplify right side
    15,459.68x = 178,911,649.71
  5. Step 5: Solve for x
    x = 178,911,649.71/15,459.68
  6. Step 6: Final answer
    x = 11,572.79

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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.