Home / 15,301.79-21,097.10-9,988.19

Finding the Fourth Proportional to 15,301.79, 21,097.10 and 9,988.19

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Solution

The fourth proportional to 15,301.79, 21,097.10 and 9,988.19 is: 13,771.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,301.79 : 21,097.10 = 9,988.19 : x
  2. Step 2: Convert to fraction form
    15,301.79/21,097.10 = 9,988.19/x
  3. Step 3: Cross multiply
    15,301.79x = 21,097.10 × 9,988.19
  4. Step 4: Simplify right side
    15,301.79x = 210,721,793.31
  5. Step 5: Solve for x
    x = 210,721,793.31/15,301.79
  6. Step 6: Final answer
    x = 13,771.06

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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.