Home / 15,311,393.78-21,130,103.95-9,428,801.18

Finding the Fourth Proportional to 15,311,393.78, 21,130,103.95 and 9,428,801.18

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Solution

The fourth proportional to 15,311,393.78, 21,130,103.95 and 9,428,801.18 is: 13,011,979.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,311,393.78 : 21,130,103.95 = 9,428,801.18 : x
  2. Step 2: Convert to fraction form
    15,311,393.78/21,130,103.95 = 9,428,801.18/x
  3. Step 3: Cross multiply
    15,311,393.78x = 21,130,103.95 × 9,428,801.18
  4. Step 4: Simplify right side
    15,311,393.78x = 199,231,548,928,060.16
  5. Step 5: Solve for x
    x = 199,231,548,928,060.16/15,311,393.78
  6. Step 6: Final answer
    x = 13,011,979.96

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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.