Home / 9,921.23-13,690.86-5,445.05

Finding the Fourth Proportional to 9,921.23, 13,690.86 and 5,445.05

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Solution

The fourth proportional to 9,921.23, 13,690.86 and 5,445.05 is: 7,513.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.23 : 13,690.86 = 5,445.05 : x
  2. Step 2: Convert to fraction form
    9,921.23/13,690.86 = 5,445.05/x
  3. Step 3: Cross multiply
    9,921.23x = 13,690.86 × 5,445.05
  4. Step 4: Simplify right side
    9,921.23x = 74,547,461.68
  5. Step 5: Solve for x
    x = 74,547,461.68/9,921.23
  6. Step 6: Final answer
    x = 7,513.94

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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.