Home / 13,312.79-19,969.19-4,547.78

Finding the Fourth Proportional to 13,312.79, 19,969.19 and 4,547.78

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Solution

The fourth proportional to 13,312.79, 19,969.19 and 4,547.78 is: 6,821.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,312.79 : 19,969.19 = 4,547.78 : x
  2. Step 2: Convert to fraction form
    13,312.79/19,969.19 = 4,547.78/x
  3. Step 3: Cross multiply
    13,312.79x = 19,969.19 × 4,547.78
  4. Step 4: Simplify right side
    13,312.79x = 90,815,527.14
  5. Step 5: Solve for x
    x = 90,815,527.14/13,312.79
  6. Step 6: Final answer
    x = 6,821.67

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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.