Home / 30,688.08-42,352.80-18,758.40

Finding the Fourth Proportional to 30,688.08, 42,352.80 and 18,758.40

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Solution

The fourth proportional to 30,688.08, 42,352.80 and 18,758.40 is: 25,888.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.08 : 42,352.80 = 18,758.40 : x
  2. Step 2: Convert to fraction form
    30,688.08/42,352.80 = 18,758.40/x
  3. Step 3: Cross multiply
    30,688.08x = 42,352.80 × 18,758.40
  4. Step 4: Simplify right side
    30,688.08x = 794,470,763.52
  5. Step 5: Solve for x
    x = 794,470,763.52/30,688.08
  6. Step 6: Final answer
    x = 25,888.58

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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.