Home / 30,686,465.97-42,361,133.12-20,238,680.36

Finding the Fourth Proportional to 30,686,465.97, 42,361,133.12 and 20,238,680.36

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Solution

The fourth proportional to 30,686,465.97, 42,361,133.12 and 20,238,680.36 is: 27,938,487.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,686,465.97 : 42,361,133.12 = 20,238,680.36 : x
  2. Step 2: Convert to fraction form
    30,686,465.97/42,361,133.12 = 20,238,680.36/x
  3. Step 3: Cross multiply
    30,686,465.97x = 42,361,133.12 × 20,238,680.36
  4. Step 4: Simplify right side
    30,686,465.97x = 857,333,432,590,090.50
  5. Step 5: Solve for x
    x = 857,333,432,590,090.50/30,686,465.97
  6. Step 6: Final answer
    x = 27,938,487.07

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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.