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Finding the Fourth Proportional to 7,040.34, 9,715.81 and 4,210.63

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Solution

The fourth proportional to 7,040.34, 9,715.81 and 4,210.63 is: 5,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,040.34 : 9,715.81 = 4,210.63 : x
  2. Step 2: Convert to fraction form
    7,040.34/9,715.81 = 4,210.63/x
  3. Step 3: Cross multiply
    7,040.34x = 9,715.81 × 4,210.63
  4. Step 4: Simplify right side
    7,040.34x = 40,909,681.06
  5. Step 5: Solve for x
    x = 40,909,681.06/7,040.34
  6. Step 6: Final answer
    x = 5,810.75

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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.