Home / 20,813,061.72-28,718,598.78-13,072,590.36

Finding the Fourth Proportional to 20,813,061.72, 28,718,598.78 and 13,072,590.36

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Solution

The fourth proportional to 20,813,061.72, 28,718,598.78 and 13,072,590.36 is: 18,038,022.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813,061.72 : 28,718,598.78 = 13,072,590.36 : x
  2. Step 2: Convert to fraction form
    20,813,061.72/28,718,598.78 = 13,072,590.36/x
  3. Step 3: Cross multiply
    20,813,061.72x = 28,718,598.78 × 13,072,590.36
  4. Step 4: Simplify right side
    20,813,061.72x = 375,426,477,564,135.75
  5. Step 5: Solve for x
    x = 375,426,477,564,135.75/20,813,061.72
  6. Step 6: Final answer
    x = 18,038,022.59

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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.