Home / 15,398.81-21,250.26-8,684.50

Finding the Fourth Proportional to 15,398.81, 21,250.26 and 8,684.50

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Solution

The fourth proportional to 15,398.81, 21,250.26 and 8,684.50 is: 11,984.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,398.81 : 21,250.26 = 8,684.50 : x
  2. Step 2: Convert to fraction form
    15,398.81/21,250.26 = 8,684.50/x
  3. Step 3: Cross multiply
    15,398.81x = 21,250.26 × 8,684.50
  4. Step 4: Simplify right side
    15,398.81x = 184,547,770.71
  5. Step 5: Solve for x
    x = 184,547,770.71/15,398.81
  6. Step 6: Final answer
    x = 11,984.55

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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.