Home / 9,386.16-12,948.64-5,405.80

Finding the Fourth Proportional to 9,386.16, 12,948.64 and 5,405.80

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Solution

The fourth proportional to 9,386.16, 12,948.64 and 5,405.80 is: 7,457.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,386.16 : 12,948.64 = 5,405.80 : x
  2. Step 2: Convert to fraction form
    9,386.16/12,948.64 = 5,405.80/x
  3. Step 3: Cross multiply
    9,386.16x = 12,948.64 × 5,405.80
  4. Step 4: Simplify right side
    9,386.16x = 69,997,758.11
  5. Step 5: Solve for x
    x = 69,997,758.11/9,386.16
  6. Step 6: Final answer
    x = 7,457.55

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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.