Home / 15,320.04-21,143.20-9,355.20

Finding the Fourth Proportional to 15,320.04, 21,143.20 and 9,355.20

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Solution

The fourth proportional to 15,320.04, 21,143.20 and 9,355.20 is: 12,911.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,320.04 : 21,143.20 = 9,355.20 : x
  2. Step 2: Convert to fraction form
    15,320.04/21,143.20 = 9,355.20/x
  3. Step 3: Cross multiply
    15,320.04x = 21,143.20 × 9,355.20
  4. Step 4: Simplify right side
    15,320.04x = 197,798,864.64
  5. Step 5: Solve for x
    x = 197,798,864.64/15,320.04
  6. Step 6: Final answer
    x = 12,911.12

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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.