Home / 21,780.40-30,063.72-17,312.08

Finding the Fourth Proportional to 21,780.40, 30,063.72 and 17,312.08

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Solution

The fourth proportional to 21,780.40, 30,063.72 and 17,312.08 is: 23,896.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.40 : 30,063.72 = 17,312.08 : x
  2. Step 2: Convert to fraction form
    21,780.40/30,063.72 = 17,312.08/x
  3. Step 3: Cross multiply
    21,780.40x = 30,063.72 × 17,312.08
  4. Step 4: Simplify right side
    21,780.40x = 520,465,525.74
  5. Step 5: Solve for x
    x = 520,465,525.74/21,780.40
  6. Step 6: Final answer
    x = 23,896.05

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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.