Home / 21,577.84-29,775.39-15,915.67

Finding the Fourth Proportional to 21,577.84, 29,775.39 and 15,915.67

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Solution

The fourth proportional to 21,577.84, 29,775.39 and 15,915.67 is: 21,962.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,577.84 : 29,775.39 = 15,915.67 : x
  2. Step 2: Convert to fraction form
    21,577.84/29,775.39 = 15,915.67/x
  3. Step 3: Cross multiply
    21,577.84x = 29,775.39 × 15,915.67
  4. Step 4: Simplify right side
    21,577.84x = 473,895,281.36
  5. Step 5: Solve for x
    x = 473,895,281.36/21,577.84
  6. Step 6: Final answer
    x = 21,962.13

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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.