Home / 5,210.64-7,810.50-1,921.68

Finding the Fourth Proportional to 5,210.64, 7,810.50 and 1,921.68

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Solution

The fourth proportional to 5,210.64, 7,810.50 and 1,921.68 is: 2,880.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,210.64 : 7,810.50 = 1,921.68 : x
  2. Step 2: Convert to fraction form
    5,210.64/7,810.50 = 1,921.68/x
  3. Step 3: Cross multiply
    5,210.64x = 7,810.50 × 1,921.68
  4. Step 4: Simplify right side
    5,210.64x = 15,009,281.64
  5. Step 5: Solve for x
    x = 15,009,281.64/5,210.64
  6. Step 6: Final answer
    x = 2,880.51

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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.