Home / 13,154.90-19,638.71-12,693.60

Finding the Fourth Proportional to 13,154.90, 19,638.71 and 12,693.60

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Solution

The fourth proportional to 13,154.90, 19,638.71 and 12,693.60 is: 18,950.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.90 : 19,638.71 = 12,693.60 : x
  2. Step 2: Convert to fraction form
    13,154.90/19,638.71 = 12,693.60/x
  3. Step 3: Cross multiply
    13,154.90x = 19,638.71 × 12,693.60
  4. Step 4: Simplify right side
    13,154.90x = 249,285,865.79
  5. Step 5: Solve for x
    x = 249,285,865.79/13,154.90
  6. Step 6: Final answer
    x = 18,950.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.