Home / 20,915,703.76-31,364,639.16-7,959,643.60

Finding the Fourth Proportional to 20,915,703.76, 31,364,639.16 and 7,959,643.60

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Solution

The fourth proportional to 20,915,703.76, 31,364,639.16 and 7,959,643.60 is: 11,936,072.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915,703.76 : 31,364,639.16 = 7,959,643.60 : x
  2. Step 2: Convert to fraction form
    20,915,703.76/31,364,639.16 = 7,959,643.60/x
  3. Step 3: Cross multiply
    20,915,703.76x = 31,364,639.16 × 7,959,643.60
  4. Step 4: Simplify right side
    20,915,703.76x = 249,651,349,356,203.38
  5. Step 5: Solve for x
    x = 249,651,349,356,203.38/20,915,703.76
  6. Step 6: Final answer
    x = 11,936,072.16

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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.