Home / 10,518.60-15,777.90-9,877.08

Finding the Fourth Proportional to 10,518.60, 15,777.90 and 9,877.08

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Solution

The fourth proportional to 10,518.60, 15,777.90 and 9,877.08 is: 14,815.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.60 : 15,777.90 = 9,877.08 : x
  2. Step 2: Convert to fraction form
    10,518.60/15,777.90 = 9,877.08/x
  3. Step 3: Cross multiply
    10,518.60x = 15,777.90 × 9,877.08
  4. Step 4: Simplify right side
    10,518.60x = 155,839,580.53
  5. Step 5: Solve for x
    x = 155,839,580.53/10,518.60
  6. Step 6: Final answer
    x = 14,815.62

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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.