Home / 13,748.08-18,973.28-7,779.76

Finding the Fourth Proportional to 13,748.08, 18,973.28 and 7,779.76

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Solution

The fourth proportional to 13,748.08, 18,973.28 and 7,779.76 is: 10,736.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,748.08 : 18,973.28 = 7,779.76 : x
  2. Step 2: Convert to fraction form
    13,748.08/18,973.28 = 7,779.76/x
  3. Step 3: Cross multiply
    13,748.08x = 18,973.28 × 7,779.76
  4. Step 4: Simplify right side
    13,748.08x = 147,607,564.81
  5. Step 5: Solve for x
    x = 147,607,564.81/13,748.08
  6. Step 6: Final answer
    x = 10,736.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.