Home / 15,530.15-21,428.31-10,160.45

Finding the Fourth Proportional to 15,530.15, 21,428.31 and 10,160.45

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Solution

The fourth proportional to 15,530.15, 21,428.31 and 10,160.45 is: 14,019.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,530.15 : 21,428.31 = 10,160.45 : x
  2. Step 2: Convert to fraction form
    15,530.15/21,428.31 = 10,160.45/x
  3. Step 3: Cross multiply
    15,530.15x = 21,428.31 × 10,160.45
  4. Step 4: Simplify right side
    15,530.15x = 217,721,272.34
  5. Step 5: Solve for x
    x = 217,721,272.34/15,530.15
  6. Step 6: Final answer
    x = 14,019.26

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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.