Home / 4,457.01-6,143.28-3,128.40

Finding the Fourth Proportional to 4,457.01, 6,143.28 and 3,128.40

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Solution

The fourth proportional to 4,457.01, 6,143.28 and 3,128.40 is: 4,312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,457.01 : 6,143.28 = 3,128.40 : x
  2. Step 2: Convert to fraction form
    4,457.01/6,143.28 = 3,128.40/x
  3. Step 3: Cross multiply
    4,457.01x = 6,143.28 × 3,128.40
  4. Step 4: Simplify right side
    4,457.01x = 19,218,637.15
  5. Step 5: Solve for x
    x = 19,218,637.15/4,457.01
  6. Step 6: Final answer
    x = 4,312.00

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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.