Home / 21,416.67-29,547.86-13,872.60

Finding the Fourth Proportional to 21,416.67, 29,547.86 and 13,872.60

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Solution

The fourth proportional to 21,416.67, 29,547.86 and 13,872.60 is: 19,139.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.67 : 29,547.86 = 13,872.60 : x
  2. Step 2: Convert to fraction form
    21,416.67/29,547.86 = 13,872.60/x
  3. Step 3: Cross multiply
    21,416.67x = 29,547.86 × 13,872.60
  4. Step 4: Simplify right side
    21,416.67x = 409,905,573.27
  5. Step 5: Solve for x
    x = 409,905,573.27/21,416.67
  6. Step 6: Final answer
    x = 19,139.56

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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.