Home / 19,890.40-29,835.60-7,416.40

Finding the Fourth Proportional to 19,890.40, 29,835.60 and 7,416.40

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Solution

The fourth proportional to 19,890.40, 29,835.60 and 7,416.40 is: 11,124.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.40 : 29,835.60 = 7,416.40 : x
  2. Step 2: Convert to fraction form
    19,890.40/29,835.60 = 7,416.40/x
  3. Step 3: Cross multiply
    19,890.40x = 29,835.60 × 7,416.40
  4. Step 4: Simplify right side
    19,890.40x = 221,272,743.84
  5. Step 5: Solve for x
    x = 221,272,743.84/19,890.40
  6. Step 6: Final answer
    x = 11,124.60

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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.