Home / 13,991.04-21,017.36-8,447.68

Finding the Fourth Proportional to 13,991.04, 21,017.36 and 8,447.68

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Solution

The fourth proportional to 13,991.04, 21,017.36 and 8,447.68 is: 12,690.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,991.04 : 21,017.36 = 8,447.68 : x
  2. Step 2: Convert to fraction form
    13,991.04/21,017.36 = 8,447.68/x
  3. Step 3: Cross multiply
    13,991.04x = 21,017.36 × 8,447.68
  4. Step 4: Simplify right side
    13,991.04x = 177,547,931.72
  5. Step 5: Solve for x
    x = 177,547,931.72/13,991.04
  6. Step 6: Final answer
    x = 12,690.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.