Home / 15,215.95-20,990.75-9,547.88

Finding the Fourth Proportional to 15,215.95, 20,990.75 and 9,547.88

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Solution

The fourth proportional to 15,215.95, 20,990.75 and 9,547.88 is: 13,171.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.95 : 20,990.75 = 9,547.88 : x
  2. Step 2: Convert to fraction form
    15,215.95/20,990.75 = 9,547.88/x
  3. Step 3: Cross multiply
    15,215.95x = 20,990.75 × 9,547.88
  4. Step 4: Simplify right side
    15,215.95x = 200,417,009.42
  5. Step 5: Solve for x
    x = 200,417,009.42/15,215.95
  6. Step 6: Final answer
    x = 13,171.51

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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.