Home / 13,287.60-19,931.40-7,045.20

Finding the Fourth Proportional to 13,287.60, 19,931.40 and 7,045.20

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Solution

The fourth proportional to 13,287.60, 19,931.40 and 7,045.20 is: 10,567.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.60 : 19,931.40 = 7,045.20 : x
  2. Step 2: Convert to fraction form
    13,287.60/19,931.40 = 7,045.20/x
  3. Step 3: Cross multiply
    13,287.60x = 19,931.40 × 7,045.20
  4. Step 4: Simplify right side
    13,287.60x = 140,420,699.28
  5. Step 5: Solve for x
    x = 140,420,699.28/13,287.60
  6. Step 6: Final answer
    x = 10,567.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.