Home / 12,315.48-18,465.84-4,921.08

Finding the Fourth Proportional to 12,315.48, 18,465.84 and 4,921.08

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Solution

The fourth proportional to 12,315.48, 18,465.84 and 4,921.08 is: 7,378.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.48 : 18,465.84 = 4,921.08 : x
  2. Step 2: Convert to fraction form
    12,315.48/18,465.84 = 4,921.08/x
  3. Step 3: Cross multiply
    12,315.48x = 18,465.84 × 4,921.08
  4. Step 4: Simplify right side
    12,315.48x = 90,871,875.91
  5. Step 5: Solve for x
    x = 90,871,875.91/12,315.48
  6. Step 6: Final answer
    x = 7,378.67

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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.