Home / 15,935.08-21,990.56-9,643

Finding the Fourth Proportional to 15,935.08, 21,990.56 and 9,643

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Solution

The fourth proportional to 15,935.08, 21,990.56 and 9,643 is: 13,307.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,935.08 : 21,990.56 = 9,643 : x
  2. Step 2: Convert to fraction form
    15,935.08/21,990.56 = 9,643/x
  3. Step 3: Cross multiply
    15,935.08x = 21,990.56 × 9,643
  4. Step 4: Simplify right side
    15,935.08x = 212,054,970.08
  5. Step 5: Solve for x
    x = 212,054,970.08/15,935.08
  6. Step 6: Final answer
    x = 13,307.43

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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.