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Finding the Fourth Proportional to 12,457.95, 18,690.95 and 7,459.55

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Solution

The fourth proportional to 12,457.95, 18,690.95 and 7,459.55 is: 11,191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457.95 : 18,690.95 = 7,459.55 : x
  2. Step 2: Convert to fraction form
    12,457.95/18,690.95 = 7,459.55/x
  3. Step 3: Cross multiply
    12,457.95x = 18,690.95 × 7,459.55
  4. Step 4: Simplify right side
    12,457.95x = 139,425,945.32
  5. Step 5: Solve for x
    x = 139,425,945.32/12,457.95
  6. Step 6: Final answer
    x = 11,191.72

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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.