Home / 8,721.36-12,035.28-4,742.40

Finding the Fourth Proportional to 8,721.36, 12,035.28 and 4,742.40

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Solution

The fourth proportional to 8,721.36, 12,035.28 and 4,742.40 is: 6,544.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.36 : 12,035.28 = 4,742.40 : x
  2. Step 2: Convert to fraction form
    8,721.36/12,035.28 = 4,742.40/x
  3. Step 3: Cross multiply
    8,721.36x = 12,035.28 × 4,742.40
  4. Step 4: Simplify right side
    8,721.36x = 57,076,111.87
  5. Step 5: Solve for x
    x = 57,076,111.87/8,721.36
  6. Step 6: Final answer
    x = 6,544.40

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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.