Home / 15,471.36-21,345.30-8,756.28

Finding the Fourth Proportional to 15,471.36, 21,345.30 and 8,756.28

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Solution

The fourth proportional to 15,471.36, 21,345.30 and 8,756.28 is: 12,080.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,471.36 : 21,345.30 = 8,756.28 : x
  2. Step 2: Convert to fraction form
    15,471.36/21,345.30 = 8,756.28/x
  3. Step 3: Cross multiply
    15,471.36x = 21,345.30 × 8,756.28
  4. Step 4: Simplify right side
    15,471.36x = 186,905,423.48
  5. Step 5: Solve for x
    x = 186,905,423.48/15,471.36
  6. Step 6: Final answer
    x = 12,080.74

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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.