Home / 7,985.56-11,020-4,628.40

Finding the Fourth Proportional to 7,985.56, 11,020 and 4,628.40

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Solution

The fourth proportional to 7,985.56, 11,020 and 4,628.40 is: 6,387.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.56 : 11,020 = 4,628.40 : x
  2. Step 2: Convert to fraction form
    7,985.56/11,020 = 4,628.40/x
  3. Step 3: Cross multiply
    7,985.56x = 11,020 × 4,628.40
  4. Step 4: Simplify right side
    7,985.56x = 51,004,968.00
  5. Step 5: Solve for x
    x = 51,004,968.00/7,985.56
  6. Step 6: Final answer
    x = 6,387.15

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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.