Home / 15,316.40-21,138.59-9,346.80

Finding the Fourth Proportional to 15,316.40, 21,138.59 and 9,346.80

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Solution

The fourth proportional to 15,316.40, 21,138.59 and 9,346.80 is: 12,899.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,316.40 : 21,138.59 = 9,346.80 : x
  2. Step 2: Convert to fraction form
    15,316.40/21,138.59 = 9,346.80/x
  3. Step 3: Cross multiply
    15,316.40x = 21,138.59 × 9,346.80
  4. Step 4: Simplify right side
    15,316.40x = 197,578,126.28
  5. Step 5: Solve for x
    x = 197,578,126.28/15,316.40
  6. Step 6: Final answer
    x = 12,899.78

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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.