Home / 9,315.04-12,854.80-5,123.28

Finding the Fourth Proportional to 9,315.04, 12,854.80 and 5,123.28

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Solution

The fourth proportional to 9,315.04, 12,854.80 and 5,123.28 is: 7,070.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,315.04 : 12,854.80 = 5,123.28 : x
  2. Step 2: Convert to fraction form
    9,315.04/12,854.80 = 5,123.28/x
  3. Step 3: Cross multiply
    9,315.04x = 12,854.80 × 5,123.28
  4. Step 4: Simplify right side
    9,315.04x = 65,858,739.74
  5. Step 5: Solve for x
    x = 65,858,739.74/9,315.04
  6. Step 6: Final answer
    x = 7,070.15

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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.