Finding the Fourth Proportional to 28,903,691.68, 39,898,315.92 and 21,681,358.24
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Solution
The fourth proportional to 28,903,691.68, 39,898,315.92 and 21,681,358.24 is: 29,928,691.82
Step by Step Solution
- Step 1: Write the proportion equation
28,903,691.68 : 39,898,315.92 = 21,681,358.24 : x - Step 2: Convert to fraction form
28,903,691.68/39,898,315.92 = 21,681,358.24/x - Step 3: Cross multiply
28,903,691.68x = 39,898,315.92 × 21,681,358.24 - Step 4: Simplify right side
28,903,691.68x = 865,049,680,634,215.12 - Step 5: Solve for x
x = 865,049,680,634,215.12/28,903,691.68 - Step 6: Final answer
x = 29,928,691.82
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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.