Home / 20,742,428.70-31,113,643.05-19,679,546.70

Finding the Fourth Proportional to 20,742,428.70, 31,113,643.05 and 19,679,546.70

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Solution

The fourth proportional to 20,742,428.70, 31,113,643.05 and 19,679,546.70 is: 29,519,320.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742,428.70 : 31,113,643.05 = 19,679,546.70 : x
  2. Step 2: Convert to fraction form
    20,742,428.70/31,113,643.05 = 19,679,546.70/x
  3. Step 3: Cross multiply
    20,742,428.70x = 31,113,643.05 × 19,679,546.70
  4. Step 4: Simplify right side
    20,742,428.70x = 612,302,391,409,605.38
  5. Step 5: Solve for x
    x = 612,302,391,409,605.38/20,742,428.70
  6. Step 6: Final answer
    x = 29,519,320.05

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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.