Home / 20,742,019.17-28,634,736.81-15,153,990.75

Finding the Fourth Proportional to 20,742,019.17, 28,634,736.81 and 15,153,990.75

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Solution

The fourth proportional to 20,742,019.17, 28,634,736.81 and 15,153,990.75 is: 20,920,361.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742,019.17 : 28,634,736.81 = 15,153,990.75 : x
  2. Step 2: Convert to fraction form
    20,742,019.17/28,634,736.81 = 15,153,990.75/x
  3. Step 3: Cross multiply
    20,742,019.17x = 28,634,736.81 × 15,153,990.75
  4. Step 4: Simplify right side
    20,742,019.17x = 433,930,536,747,424.50
  5. Step 5: Solve for x
    x = 433,930,536,747,424.50/20,742,019.17
  6. Step 6: Final answer
    x = 20,920,361.38

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Double scale
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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.