Home / 42,715.08-64,070.80-13,131.65

Finding the Fourth Proportional to 42,715.08, 64,070.80 and 13,131.65

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Solution

The fourth proportional to 42,715.08, 64,070.80 and 13,131.65 is: 19,696.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,715.08 : 64,070.80 = 13,131.65 : x
  2. Step 2: Convert to fraction form
    42,715.08/64,070.80 = 13,131.65/x
  3. Step 3: Cross multiply
    42,715.08x = 64,070.80 × 13,131.65
  4. Step 4: Simplify right side
    42,715.08x = 841,355,448.17
  5. Step 5: Solve for x
    x = 841,355,448.17/42,715.08
  6. Step 6: Final answer
    x = 19,696.92

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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.