Home / 20,683,738.40-28,543,210.72-11,392,173.72

Finding the Fourth Proportional to 20,683,738.40, 28,543,210.72 and 11,392,173.72

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Solution

The fourth proportional to 20,683,738.40, 28,543,210.72 and 11,392,173.72 is: 15,721,007.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683,738.40 : 28,543,210.72 = 11,392,173.72 : x
  2. Step 2: Convert to fraction form
    20,683,738.40/28,543,210.72 = 11,392,173.72/x
  3. Step 3: Cross multiply
    20,683,738.40x = 28,543,210.72 × 11,392,173.72
  4. Step 4: Simplify right side
    20,683,738.40x = 325,169,215,020,325.88
  5. Step 5: Solve for x
    x = 325,169,215,020,325.88/20,683,738.40
  6. Step 6: Final answer
    x = 15,721,007.92

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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.