Home / 51,990.49-77,985.70-20,415.43

Finding the Fourth Proportional to 51,990.49, 77,985.70 and 20,415.43

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Solution

The fourth proportional to 51,990.49, 77,985.70 and 20,415.43 is: 30,623.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,990.49 : 77,985.70 = 20,415.43 : x
  2. Step 2: Convert to fraction form
    51,990.49/77,985.70 = 20,415.43/x
  3. Step 3: Cross multiply
    51,990.49x = 77,985.70 × 20,415.43
  4. Step 4: Simplify right side
    51,990.49x = 1,592,111,599.35
  5. Step 5: Solve for x
    x = 1,592,111,599.35/51,990.49
  6. Step 6: Final answer
    x = 30,623.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.