Home / 21,780.90-30,064.41-17,312.58

Finding the Fourth Proportional to 21,780.90, 30,064.41 and 17,312.58

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Solution

The fourth proportional to 21,780.90, 30,064.41 and 17,312.58 is: 23,896.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.90 : 30,064.41 = 17,312.58 : x
  2. Step 2: Convert to fraction form
    21,780.90/30,064.41 = 17,312.58/x
  3. Step 3: Cross multiply
    21,780.90x = 30,064.41 × 17,312.58
  4. Step 4: Simplify right side
    21,780.90x = 520,492,503.28
  5. Step 5: Solve for x
    x = 520,492,503.28/21,780.90
  6. Step 6: Final answer
    x = 23,896.74

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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.