Home / 15,686.10-21,637.31-9,308.49

Finding the Fourth Proportional to 15,686.10, 21,637.31 and 9,308.49

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Solution

The fourth proportional to 15,686.10, 21,637.31 and 9,308.49 is: 12,840.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,686.10 : 21,637.31 = 9,308.49 : x
  2. Step 2: Convert to fraction form
    15,686.10/21,637.31 = 9,308.49/x
  3. Step 3: Cross multiply
    15,686.10x = 21,637.31 × 9,308.49
  4. Step 4: Simplify right side
    15,686.10x = 201,410,637.22
  5. Step 5: Solve for x
    x = 201,410,637.22/15,686.10
  6. Step 6: Final answer
    x = 12,840.07

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1.5x scale

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.