Home / 12,945.04-19,403.72-7,386.40

Finding the Fourth Proportional to 12,945.04, 19,403.72 and 7,386.40

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Solution

The fourth proportional to 12,945.04, 19,403.72 and 7,386.40 is: 11,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.04 : 19,403.72 = 7,386.40 : x
  2. Step 2: Convert to fraction form
    12,945.04/19,403.72 = 7,386.40/x
  3. Step 3: Cross multiply
    12,945.04x = 19,403.72 × 7,386.40
  4. Step 4: Simplify right side
    12,945.04x = 143,323,637.41
  5. Step 5: Solve for x
    x = 143,323,637.41/12,945.04
  6. Step 6: Final answer
    x = 11,071.70

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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.