Home / 15,287.56-21,089.07-9,985.48

Finding the Fourth Proportional to 15,287.56, 21,089.07 and 9,985.48

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Solution

The fourth proportional to 15,287.56, 21,089.07 and 9,985.48 is: 13,774.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,287.56 : 21,089.07 = 9,985.48 : x
  2. Step 2: Convert to fraction form
    15,287.56/21,089.07 = 9,985.48/x
  3. Step 3: Cross multiply
    15,287.56x = 21,089.07 × 9,985.48
  4. Step 4: Simplify right side
    15,287.56x = 210,584,486.70
  5. Step 5: Solve for x
    x = 210,584,486.70/15,287.56
  6. Step 6: Final answer
    x = 13,774.89

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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.