Home / 51,386.40-77,079.60-21,805.20

Finding the Fourth Proportional to 51,386.40, 77,079.60 and 21,805.20

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Solution

The fourth proportional to 51,386.40, 77,079.60 and 21,805.20 is: 32,707.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,386.40 : 77,079.60 = 21,805.20 : x
  2. Step 2: Convert to fraction form
    51,386.40/77,079.60 = 21,805.20/x
  3. Step 3: Cross multiply
    51,386.40x = 77,079.60 × 21,805.20
  4. Step 4: Simplify right side
    51,386.40x = 1,680,736,093.92
  5. Step 5: Solve for x
    x = 1,680,736,093.92/51,386.40
  6. Step 6: Final answer
    x = 32,707.80

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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.