Home / 15,513.06-21,407.40-8,439.50

Finding the Fourth Proportional to 15,513.06, 21,407.40 and 8,439.50

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Solution

The fourth proportional to 15,513.06, 21,407.40 and 8,439.50 is: 11,646.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,513.06 : 21,407.40 = 8,439.50 : x
  2. Step 2: Convert to fraction form
    15,513.06/21,407.40 = 8,439.50/x
  3. Step 3: Cross multiply
    15,513.06x = 21,407.40 × 8,439.50
  4. Step 4: Simplify right side
    15,513.06x = 180,667,645.26
  5. Step 5: Solve for x
    x = 180,667,645.26/15,513.06
  6. Step 6: Final answer
    x = 11,646.16

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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.